Exponents, Computation Of Whole Numbers, Probability Of A Simple Event
This quiz is to review students on evaluating exponents, probability of simple events, and basic computation skills.
Questions and Answers
- 1.
Evaluate: 1/2 to the third power
- A.
1/4
- B.
1-6
- C.
1/8
- D.
1/3
Correct Answer
C. 1/8Explanation
To evaluate 1/2 to the third power, we need to multiply 1/2 by itself three times. When we do this, we get (1/2) * (1/2) * (1/2) = 1/8. Therefore, the correct answer is 1/8.Rate this question:
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- 2.
Evaluate: 5 to the third power.
- A.
15
- B.
125
- C.
625
- D.
8
Correct Answer
B. 125Explanation
To evaluate 5 to the third power, we need to multiply 5 by itself three times. So, 5 to the third power is equal to 5 x 5 x 5, which equals 125.Rate this question:
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- 3.
Evaluate: (0.5) to the second power.
- A.
0.25
- B.
25
- C.
0.1
- D.
10
Correct Answer
A. 0.25Explanation
To evaluate (0.5) to the second power, we need to multiply 0.5 by itself. When we do this, we get 0.25 as the result.Rate this question:
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- 4.
+2 + (+5)=
- A.
-8
- B.
+3
- C.
8
- D.
-3
Correct Answer
C. 8Explanation
The given expression is "2 + 5". When we add 2 and 5, the sum is 7. However, there is a positive sign in front of the 5, indicating that it is positive. So, the expression becomes "2 + (+5)" which is equivalent to "2 + 5". Therefore, the answer is 7.Rate this question:
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- 5.
- 12 + - 5 =
- A.
17
- B.
+17
- C.
- 17
- D.
-7
Correct Answer
C. - 17Explanation
The given expression is a subtraction problem: -12 - 5. When subtracting a negative number, it is equivalent to adding its positive counterpart. So, -12 + (-5) is equal to -17.Rate this question:
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- 6.
-7 -( -9)
- A.
-16
- B.
-2
- C.
+16
- D.
+2
Correct Answer
D. +2Explanation
When subtracting a negative number, it is equivalent to adding the positive form of that number. In this case, we have -7 - (-9), which can be rewritten as -7 + 9. Adding these two numbers gives us 2, so the correct answer is +2.Rate this question:
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- 7.
-8 - ( + 7) =
- A.
15
- B.
-15
- C.
-1
- D.
+1
Correct Answer
B. -15Explanation
The given expression is -8 - (+7). The positive sign before 7 indicates that it is a positive number. When we subtract a positive number from a negative number, we add the absolute values and keep the sign of the larger number. In this case, the absolute value of -8 is 8 and the absolute value of +7 is 7. Adding them together gives us 15. Since -8 is the larger number and it is negative, the answer is -15.Rate this question:
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- 8.
75-( - 15) =
- A.
60
- B.
80
- C.
90
- D.
-90
Correct Answer
C. 90Explanation
The given expression is 75 - (-15). When subtracting a negative number, it is equivalent to adding the positive of that number. Therefore, -(-15) becomes +15. So, the expression simplifies to 75 + 15, which equals 90.Rate this question:
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- 9.
Jon had 3 red marbles, 7 black marbles, 9 green marbles, and 6 yellow marble in a bag. Without looking, what is the probability of Jon pulling out a green marble?
- A.
9
- B.
9/16
- C.
9/20
- D.
9/25
Correct Answer
D. 9/25Explanation
The probability of Jon pulling out a green marble can be calculated by dividing the number of green marbles (9) by the total number of marbles in the bag (3 + 7 + 9 + 6 = 25). Therefore, the probability is 9/25.Rate this question:
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