Mathematics Jss 2
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Which one do you like?
- The product of 0.017 and 100 is ___
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A. 0.00017
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B. 0.0017
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C. 0.017Â Â Â Â Â Â Â Â Â Â
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D. 1.7
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Option 5
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A. 0.00017Â Â Â Â Â
This Mathematics quiz for JSS 2 assesses basic numerical and algebraic skills. It covers decimal and fraction conversions, simple equations, and understanding number places. Essential for reinforcing foundational math concepts relevant to middle school curriculum.
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- 2.
2. John thinks of a number. 18 is subtracted from the number, the result gives – 2. What is the number?
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A. 14
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B. 16
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C. 18
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C. 18
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D. 20
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Option 6
Correct Answer
A. B. 16Explanation
If we let the number that John thinks of be x, then we can write the equation x - 18 = -2. Solving this equation, we add 18 to both sides to isolate x, giving us x = 16. Therefore, the number that John thinks of is 16.Rate this question:
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- 3.
3. Express 20% as a decimal number.
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A. 2.00
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B. 0.5
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C. 0.2
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D. 0.05
Correct Answer
A. C. 0.2Explanation
C. 0.2. To express 20% as a decimal number, you can divide 20 by 100, which equals 0.2. The percent sign (%) means "per hundred," so to convert a percentage to a decimal, you divide the percentage by 100. Therefore, 20% is equivalent to 0.2 in decimal form.Rate this question:
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- 4.
4. The value of the 4 in 26.645 is ___
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A. 4 Thousandth
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B. 4 hundredths
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C. 4 thenths
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Option 4
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D. 4 units
Correct Answer
A. B. 4 hundredthsExplanation
In the number 26.645, the digit 4 is located in the hundredths place. This means that it represents a value that is one-hundredth of the whole number. Therefore, the correct answer is B. 4 hundredths.Rate this question:
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- 5.
5. Convert 1/3 to decimal fraction and give your answer to 4 decimal places.
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A. 0.3330
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B. 0.3333
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C. 0.3334
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D. 0.4444
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Option 5
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Option 6
Correct Answer
A. B. 0.3333Explanation
To convert 1/3 to a decimal fraction, we divide 1 by 3. The result is 0.3333, which is a recurring decimal that goes on indefinitely. Since the question asks for the answer to 4 decimal places, we round the recurring decimal to 0.3333.Rate this question:
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- 6.
6. Express 0.0001 in standard form.
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A. 1 x 104
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B. 1 x 103
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C. 1 x 10-3
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D. 1 x 10-4
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Option 5
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Option 6
Correct Answer
A. D. 1 x 10-4Explanation
The correct answer is D. 1 x 10-4. In standard form, a number is expressed as a decimal between 1 and 10 multiplied by a power of 10. In this case, 0.0001 can be written as 1 x 10-4, where the decimal is moved 4 places to the right to get a value between 1 and 10.Rate this question:
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- 7.
7. The following are polygons EXCEPT ___
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A. Circle A. Circle
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B. quadrilateral
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C. hexagon
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D. heptagonÂ
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Option 5
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Option 6
Correct Answer
A. A. Circle A. CircleExplanation
A circle is not considered a polygon because it does not have straight sides. A polygon is defined as a closed figure with straight sides. Quadrilaterals, hexagons, and heptagons all have straight sides and are therefore polygons.Rate this question:
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- 8.
8. Mr. Ojo made a profit of 32% on an article he bought for N3,200.00. How much did he sell the article?
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A. N2,024.00
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B. N2,176.00
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C. N3,200.00
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D. N4,224.00
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Option 5
Correct Answer
A. D. N4,224.00Explanation
Mr. Ojo made a profit of 32% on an article he bought for N3,200.00. To find out how much he sold the article for, we need to calculate 32% of N3,200.00 and add it to the original cost price. 32% of N3,200.00 is N1,024.00. Adding this to the original cost price, we get N3,200.00 + N1,024.00 = N4,224.00. Therefore, Mr. Ojo sold the article for N4,224.00.Rate this question:
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- 9.
9. How many faces have a cylinder?
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A. 1
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B. 2
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C. 3
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D. 5
Correct Answer
A. B. 2Explanation
A cylinder has two faces. The two faces are the circular bases of the cylinder. These bases are congruent and parallel to each other.Rate this question:
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- 10.
10. The LCM of 5ab2 and 3a2b is:
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A. ab Â
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B. 3a/2b
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C. 5a3b3
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Option 4
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D. 15a2b2
Correct Answer
A. D. 15a2b2Explanation
The LCM (Least Common Multiple) is the smallest multiple that both numbers have in common. To find the LCM of 5ab2 and 3a2b, we need to find the highest power of each variable that appears in either expression. In this case, the highest power of "a" is 2 and the highest power of "b" is 2. The LCM will then be the product of these highest powers, along with any remaining factors. Therefore, the LCM is 15a2b2.Rate this question:
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- 11.
11. Evaluate 2p – (p – 2p)
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A. 0
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B. p
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C. 3p
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Option 4
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 D. 2p
Correct Answer
A. C. 3pExplanation
The expression 2p - (p - 2p) simplifies to 2p - p + 2p. Simplifying further, we get 3p. Therefore, the correct answer is C. 3p.Rate this question:
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- 12.
12. The first three prime numbers are:
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A. 1, 2, 3
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B. 1, 3, 5
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C. 3, 5, 7
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D. 2, 3, 5
Correct Answer
A. D. 2, 3, 5Explanation
The first three prime numbers are 2, 3, and 5. A prime number is a number greater than 1 that is only divisible by 1 and itself. Among the given options, only option D contains the numbers 2, 3, and 5, which are the first three prime numbers. Option A includes the number 1, which is not a prime number as it is divisible by 1 and itself. Option B includes the numbers 1 and 5, and option C includes the numbers 3, 5, and 7, but none of them contain the correct sequence of the first three prime numbers. Therefore, the correct answer is D.Rate this question:
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- 13.
If a and b are positive integers such that a^2 - b^2 = 63, which of the following is the value of a + b?
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8
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9
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10
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11
Correct Answer
A. 9Explanation
The equation a^2 - b^2 = 63 can be factored as:
(a - b)(a + b) = 63
Now, we look for pairs of factors of 63, which are:
1 * 63
3 * 21
7 * 9
We need a pair of factors that makes both a and b positive integers. Let's choose (a - b) = 7 and (a + b) = 9.
To solve for a and b, we add the two equations:
a - b = 7
a + b = 9
Adding these gives:
2a = 16, so a = 8.
Now, substitute a = 8 into the equation a + b = 9:
8 + b = 9, so b = 1.Rate this question:
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- 14.
14. Find the product of the square root of 16 and the square of 9 is
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A. 3240
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B. 1296
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C. 324
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D. 144C
Correct Answer
A. C. 324Explanation
The product of the square root of 16 and the square of 9 can be calculated as follows: √16 * 9^2 = 4 * 81 = 324. Therefore, the correct answer is C. 324.Rate this question:
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- 15.
15. 15. Evaluate 2a-3b/5c, given that a = 2, b = -2, c = 1
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A. -2
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B. -1
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C. 0
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D. 2
Correct Answer
A. D. 2Explanation
The given expression is 2a-3b/5c. Plugging in the values of a, b, and c, we get 2(2)-3(-2)/5(1). Simplifying this expression, we get 4+6/5, which is equal to 10/5. Simplifying further, we get 2. Therefore, the correct answer is D. 2.Rate this question:
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- 16.
16. Simplify ( x/3)2
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A. Â 2x/3
![Mathematics Jss 2 - Quiz]()
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B. x2/9
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C. x2/6
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D. x2/3
Correct Answer
A. B. x2/9Explanation
The expression (x/3)2 can be simplified by squaring both the numerator and the denominator. When we square the numerator x, we get x2, and when we square the denominator 3, we get 9. Therefore, the simplified expression is x2/9.Rate this question:
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- 17.
17. Factorize x2 – 1.
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A. (x-1) (x+1)
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B. (x-1) (x -1)
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C. (x+1) (x+1)
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Option 4
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D. x (x – 1)
Correct Answer
A. A. (x-1) (x+1)Explanation
The given expression is a quadratic expression in the form of a difference of squares. The expression can be factored by using the formula a^2 - b^2 = (a+b)(a-b). In this case, a = x and b = 1. Plugging these values into the formula, we get (x+1)(x-1). Therefore, the correct answer is A. (x-1) (x+1).Rate this question:
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- 18.
18, The probability of a student passing JSSCE Mathematics is 70/100. What is the probability that the student will fail?
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A. 10/100
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B. 30/100
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C. 50/100
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D. 70/100
Correct Answer
A. B. 30/100Explanation
The probability of passing is given as 70/100. Since the sum of the probabilities of all possible outcomes must equal 1, the probability of failing can be calculated by subtracting the probability of passing from 1. Therefore, the probability of failing is 1 - 70/100 = 30/100, which is equivalent to 3/10 or 0.3. Therefore, the correct answer is B. 30/100.Rate this question:
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- 19.
19. If 13 is the mean of the following set of numbers: 12, 11, 14 and x, what is the value of x?
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A. 11
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B. 12
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C. 13
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D. 15
Correct Answer
A. D. 15Explanation
The mean of a set of numbers is found by adding up all the numbers and dividing by the total number of numbers. In this case, the mean is 13. To find the value of x, we can set up an equation: (12 + 11 + 14 + x) / 4 = 13. Simplifying this equation, we get (37 + x) / 4 = 13. Cross multiplying, we get 37 + x = 52. Subtracting 37 from both sides, we find that x = 15. Therefore, the value of x is 15.Rate this question:
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- 20.
If x + y = 7 and x - y = 3, what is the value of x^2 - y^2?
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10
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21
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28
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40
Correct Answer
A. 21Explanation
We can use the difference of squares factorization: x^2 - y^2 = (x + y)(x - y). We are given that x + y = 7 and x - y = 3, so x^2 - y^2 = 7 * 3 = 21.Rate this question:
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- 21.
21. The value of 7—(—15) is
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A. -8
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B. 22
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C. 8
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D. 105
Correct Answer
A. B. 22Explanation
The value of 7 - (-15) can be simplified by applying the rule of subtracting a negative number, which is equivalent to adding the positive number. Therefore, 7 - (-15) becomes 7 + 15, which equals 22.Rate this question:
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- 22.
22. Round off 3.9695 to 2 deimal places
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A. 3.98
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B. 3.97
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C. 3.96
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D. 3.95
Correct Answer
A. A. 3.98Explanation
The number 3.9695 needs to be rounded off to 2 decimal places. When rounding off to 2 decimal places, we look at the digit in the third decimal place. If it is 5 or greater, we round up the second decimal place. In this case, the digit in the third decimal place is 9, which is greater than 5. Therefore, we round up the second decimal place, resulting in the number 3.98.Rate this question:
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- 23.
23. Which of the following fractions is the smallest fraction: 3/4, 5/6, 1/2and 12/15 ?
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A. 12/15
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B. 6/15
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C. 5/6
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D. ½
Correct Answer
A. D. ½Explanation
The smallest fraction is the fraction with the smallest numerator and the smallest denominator. In this case, the fraction 1/2 has the smallest numerator (1) and the smallest denominator (2) compared to the other fractions. Therefore, 1/2 is the smallest fraction among the given options.Rate this question:
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- 24.
24. Find the highest common factor of 325, 350, and 375
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A. 13
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B. 15
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C. 21
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D. 25
Correct Answer
A. D. 25Explanation
The highest common factor (HCF) of three numbers can be found by finding the factors of each number and identifying the highest common factor. In this case, the factors of 325 are 1, 5, 13, 25, 65, and 325. The factors of 350 are 1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 175, and 350. The factors of 375 are 1, 3, 5, 15, 25, 75, and 375. The highest common factor among these three numbers is 25, which is the correct answer.Rate this question:
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- 25.
25. Express 6561 in index form.
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A. 93
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B. 94
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C. 95
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D. 96
Correct Answer
A. B. 94Explanation
The correct answer is B. 94. In index form, a number is expressed as a base raised to a power. In this case, 6561 can be expressed as 9^4, which means 9 raised to the power of 4.Rate this question:
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- 26.
26. If N9 600 was shared among three boys Ola, Tope and Jide in the ratio 3 : 4 : 5, respectively, what is Jide’s share?
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A. N2, 400
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B. N4, 000
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C. N950
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D. N3, 200
Correct Answer
A. B. N4, 000Explanation
The ratio of Jide's share to the total amount is 5/12 (5 parts out of 12 total parts). Therefore, Jide's share can be calculated by multiplying the total amount by the ratio: (5/12) * N9,600 = N4,000. Therefore, Jide's share is N4,000.Rate this question:
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- 27.
What is the correct name for one thousand billion?
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One hundred
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One cillion
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One gazillion
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One trillion
Correct Answer
A. One trillionExplanation
The correct name for one thousand billion is one trillion, or 1,000,000,000,000 (1 followed by 12 zeros). This number is also sometimes referred to as a tera-, as in terabyte (TB) in computing and data storage contexts. The term "trillion" is used in the short scale numbering system, which is commonly used in the United States and other English-speaking countries, as well as in many other parts of the world. However, in some countries, like many in Europe, a different numbering system called the long scale is used, where a thousand billion would be referred to as a "billion".Rate this question:
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- 28.
28. 30% of N900
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A. N270
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B. N27
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C. N90
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D. 290A
Correct Answer
A. A. N270Explanation
30% of N900 is equal to 0.30 * N900 = N270.Rate this question:
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- 29.
29. A trader buys a gallon of palm oil for N1,500.00 and sells it at a profit of 10%. Calculate the selling price
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A. N1,750.00
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B. N1,650.00
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C. N1,550.00
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D. N1,450.00
Correct Answer
A. B. N1,650.00 -
- 30.
30. Solve the equation 2 ½ = 1/y
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A. 1/5
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B. 3/5
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C. 2/5
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D. 4/5
Correct Answer
A. C. 2/5Explanation
To solve the equation 2 ½ = 1/y, we can start by converting the mixed number 2 ½ into an improper fraction. 2 ½ is equal to 5/2. So, the equation becomes 5/2 = 1/y. To solve for y, we can cross multiply. Multiplying both sides by y, we get 5y = 2. Dividing both sides by 5, we find that y = 2/5. Therefore, the correct answer is C. 2/5.Rate this question:
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- 31.
31. What is the value of 962?
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A. 6226
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B. 7226
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C. 9216
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D. 7216
Correct Answer
A. C. 9216 -
- 32.
32. If a = 2, put (>, <, , or =) in the box for the inequality below: -23 -45
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A. >
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B. ->
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C. <
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D. =
Correct Answer
A. C. <Explanation
The inequality is -23 - 45 â–¢ -68
Simplifying the left side, -23 - 45 = -68
Therefore, the inequality becomes -68 â–¢ -68
Since both sides are equal, the correct symbol is <.Rate this question:
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- 33.
34. These numbers are square numbers except
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A. 324
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224
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C. 196
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D. 169
Correct Answer
A. 224Explanation
The correct answer is 224. This number is not a square number because it cannot be expressed as the product of an integer multiplied by itself. The other options, 324, 196, and 169, are all square numbers because they can be expressed as the product of an integer multiplied by itself.Rate this question:
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- 34.
35. 5M/6=31/3
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A. 60
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B. 40
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C. 10
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D. 4
Correct Answer
A. D. 4Explanation
The given equation can be solved by cross-multiplying. Multiplying both sides of the equation by 6, we get 5M = 62. Dividing both sides by 5, we find that M = 12.4. However, none of the answer choices match this value. Therefore, the given equation does not have a solution, and the correct answer is D. 4.Rate this question:
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- 35.
36. Increase 12 by 30%
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A. 33.6
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B. 40
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C. 15.6
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D. 156
Correct Answer
A. C. 15.6Explanation
To increase 12 by 30%, we need to find 30% of 12 and add it to 12. 30% of 12 is 0.3 * 12 = 3.6. Adding 3.6 to 12 gives us 15.6. Therefore, the correct answer is C. 15.6.Rate this question:
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- 36.
37. The point where the x axis crosses the y axis in a graph is called ___
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A. cartesian
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B. intersection
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C. origin
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D. ordered pairs
Correct Answer
A. C. originExplanation
The point where the x axis crosses the y axis in a graph is called the origin. It is represented by the coordinates (0,0) and is the starting point for measuring distances in both the x and y directions.Rate this question:
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- 37.
38. Factorize 24pz – 8pr.
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A. 8p (3z –r)
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B. 8p (z – 3r)
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C. 8p (3z + r)
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D. (8p (4z – r)
Correct Answer
A. A. 8p (3z –r)Explanation
To factorize 24pz - 8pr, we can factor out the greatest common factor, which is 8p. This leaves us with 8p(3z - r). Therefore, the correct answer is A. 8p (3z –r).Rate this question:
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- 38.
39. Find the area of triangles of height 5cm, and base 7cm.
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A. 17.5cm2
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B. 15.7cm2
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C. 18cm2
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D. 35cm2
Correct Answer
A. A. 17.5cm2Explanation
The formula to find the area of a triangle is 1/2 * base * height. In this case, the base is 7cm and the height is 5cm. Plugging these values into the formula, we get 1/2 * 7cm * 5cm = 17.5cm2. Therefore, the correct answer is A. 17.5cm2.Rate this question:
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- 39.
40. A pack of cards has ___ unbiased cards.
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A. 50
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B. 52
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C. 54
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D. 58
Correct Answer
A. B. 52Explanation
A standard pack of cards consists of 52 cards. This includes 4 suits (hearts, diamonds, clubs, and spades) with each suit having 13 cards (Ace, 2-10, Jack, Queen, and King). Therefore, the correct answer is B. 52.Rate this question:
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- 40.
41. Express as a single number: 3.8 x 104 – 9.7 103
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A. 28300
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B. 28700
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C. 59700
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D. 49700
Correct Answer
A. A. 28300Explanation
To express the given expression as a single number, we need to subtract 9.7 x 10^3 from 3.8 x 10^4. This can be done by subtracting the coefficients and keeping the base (10) and exponent (4) the same. 3.8 - 9.7 = -5.9, and since both numbers have the same exponent of 10^4, the answer is -5.9 x 10^4. However, the question asks for a positive single number, so we take the absolute value of -5.9 to get 5.9. Therefore, the correct answer is 5.9 x 10^4, which is equivalent to 59000.Rate this question:
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- 41.
42. If 2x0 and 4x0 are supplementary angles. What is the value of x?
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A. 750
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B. 600
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C. 450
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D. 300
Correct Answer
A. D. 300Explanation
The question states that 2x0 and 4x0 are supplementary angles. Supplementary angles are two angles that add up to 180 degrees. Therefore, we can set up the equation 2x0 + 4x0 = 180. Simplifying this equation, we get 6x0 = 180. Dividing both sides by 6, we find that x0 = 30. Therefore, the value of x is 300.Rate this question:
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- 42.
43. If 15 men dig a trench for 10 days, how many men will be required to dig the trench in 2 days?
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A. 150 men
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B. 75 men
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C. 60 men
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D. 30 men
Correct Answer
A. B. 75 menExplanation
If 15 men can dig a trench in 10 days, it means that the rate at which they dig is 1/10th of the trench per day. In other words, each man digs 1/150th of the trench per day. To complete the trench in 2 days, the total number of men required would be 2 times the number of men required to complete the trench in 1 day. Therefore, 2 * 15 = 30 men would be required to dig the trench in 2 days. Since the options provided do not include 30, the closest option is B. 75 men, which is twice the required number.Rate this question:
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- 43.
44. Find the mean score of these scores: 2, 3, 0, 8, 7, 5, 9, 6
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A. 3.75
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B. 5.50
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C. 5.00
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D. 4.00
Correct Answer
A. C. 5.00Explanation
To find the mean score, we need to add up all the scores and then divide by the total number of scores. Adding up the scores gives us 2 + 3 + 0 + 8 + 7 + 5 + 9 + 6 = 40. Since there are 8 scores, we divide 40 by 8 to get the mean score of 5.00. Therefore, the correct answer is C. 5.00.Rate this question:
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- 44.
45. Round off 23 456 713 500 145 to 3 significant figures and write your answer in words
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A. Twenty – three trillion and five hundred million
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B. Twenty – three trillion and four hundred million
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C. Twenty – three trillion and five hundred billion
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D. Twenty 0- three trillion and four hundred billion
Correct Answer
A. C. Twenty – three trillion and five hundred billionExplanation
When rounding off to 3 significant figures, we look at the digit in the fourth place. If it is 5 or greater, we round up the preceding digit. In this case, the digit in the fourth place is 5, so we round up the preceding digit. Therefore, the rounded value is 23 456 713 500 150. In words, this is twenty-three trillion and five hundred billion.Rate this question:
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- 45.
If 3x + 5 = 14, what is the value of x?
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2
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3
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4
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5
Correct Answer
A. 3Explanation
We can solve for x by subtracting 5 from both sides of the equation 3x + 5 = 14, to get 3x = 9. Then we divide both sides by 3 to get x = 3.Rate this question:
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- 46.
47. Factorize 81 + 18a + a2
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A. (a+9) (a-9)
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B. (a+9) (a+9)
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C. (a+3) (a+27)
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D. (a+1)(a+81)
Correct Answer
A. B. (a+9) (a+9)Explanation
The given expression can be factorized as (a+9)(a+9). This can be determined by using the formula for factoring a quadratic expression, which states that if the expression can be written in the form ax^2 + bx + c, then it can be factorized as (x+p)(x+q), where p and q are the factors of c that add up to b. In this case, a=1, b=18, and c=81. The factors of 81 that add up to 18 are 9 and 9, so the expression can be factorized as (a+9)(a+9).Rate this question:
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- 47.
A dataset consists of the following numbers: 2, 4, 4, 5, 6, 7, 7, 7, 8, 9. Which of the following statements is true?
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Mean < Median < Mode
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Median < Mode < Mean
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Mode < Median < Mean
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Mode = Median = Mean
Correct Answer
A. Mode < Median < MeanExplanation
Mode: The mode is the most frequent value in the dataset. In this case, the mode is 7.
Median: The median is the middle value when the data is arranged in order. Here, the median is 6.5 (the average of 6 and 7).
Mean: The mean is the sum of all values divided by the number of values. The mean of this dataset is 6.
Therefore, the correct order is Mode (7) < Median (6.5) < Mean (6).Rate this question:
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- 48.
A circle is inscribed in a square with side length 10. What is the area of the circle?
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25π
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50π
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100π
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200π
Correct Answer
A. 25πExplanation
The diameter of the circle is equal to the side length of the square, which is 10. Therefore, the radius of the circle is 5. The area of a circle is given by the formula πr^2, so the area of this circle is π⋅5^2=25π.Rate this question:
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- 49.
50. The sum of x in minutes and y seconds expressed in minutes is ___
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A. 60x + y
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B. x + 60y
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C. x + y
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D. x + Y/60
Correct Answer
A. D. x + Y/60Explanation
The question asks for the sum of x in minutes and y seconds expressed in minutes. To convert y seconds to minutes, we divide y by 60, since there are 60 seconds in a minute. Therefore, the correct answer is x + y/60.Rate this question:
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