Brain Champs-for Class 9

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| By Harshit95
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Harshit95
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Quizzes Created: 1 | Total Attempts: 247
| Attempts: 247
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  • 1/10 Questions

    If x/0.1= m,what will be x*0.01?

    • 0.001m
    • 0.1m
    • 10m
    • 1000m
    • 0.0001m
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About This Quiz

It is a mixture of few types of maths topics. It contains POLYNOMIALS,ALGEBRA etc. All questions are multiple choice. It is an interesting quiz.

Brain Champs-for Class 9 - Quiz

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  • 2. 
    The square root of 27225 lies between? - ProProfs

    The square root of 27225 lies between?

    • 50-60

    • 120-130

    • 160-170

    • 500-600

    • 570-670

    Correct Answer
    A. 160-170
    Explanation
    The square root of 27225 is approximately 165. Therefore, it lies between the range of 160-170.

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  • 3. 

    If x/y=70,x/2y=?

    • 35

    • 68

    • 72

    • 140

    • 70

    Correct Answer
    A. 35
    Explanation
    If x/y = 70, it means that x is 70 times greater than y. To find x/2y, we can substitute the value of x/y into the equation. Therefore, x/2y = (70y)/2y = 35. This means that x/2y is equal to 35.

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  • 4. 
    What is the measure of angle DCB in the paralleogram ABCD given below?If angleDCA=31 and angle DAB=44? - ProProfs

    What is the measure of angle DCB in the paralleogram ABCD given below?If angleDCA=31 and angle DAB=44?

    • 62

    • 75

    • 88

    • 105

    • 120

    Correct Answer
    A. 75
    Explanation
    In a parallelogram, opposite angles are equal. Therefore, angle DCB is equal to angle DAB, which is given as 44 degrees.

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  • 5. 

    X and y are 2 different numbers.What can be added to 6x to get 9y?

    • 3y

    • 3x

    • 9y-3x

    • 9y+3x

    • It is not possible to get 9y as 6x and 9y are not like terms

    Correct Answer
    A. 9y-3x
    Explanation
    To get 9y, we need to add 9y-6x. This is because 6x and 9y are not like terms, so we cannot simply add them together. Therefore, the correct answer is 9y-3x.

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  • 6. 

    Adding 5% of a number to itself is the same as multiplying the number by .............

    • 1.05

    • 1.5

    • 5

    • 105

    • 1.075

    Correct Answer
    A. 1.05
    Explanation
    Adding 5% of a number to itself is equivalent to multiplying the number by 1.05. This is because 5% of a number can be calculated by multiplying the number by 0.05. Adding this result to the original number is the same as multiplying the original number by 1.05.

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  • 7. 

    The sum of 3 numbers is 'k'.Each number is incresed by 15 and then the resulting number are doubled.What would be the sum of the new numbers?

    • 2k+15

    • 2k+30

    • 2k+90

    • 6k+30

    • 6k+90

    Correct Answer
    A. 2k+90
    Explanation
    When each number is increased by 15, the sum of the three new numbers would be 3k + 45. Then, when these resulting numbers are doubled, each number becomes 2 times its original value. Therefore, the sum of the new numbers would be 2(3k + 45), which simplifies to 6k + 90.

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  • 8. 

    The volume of a cube is 64cm cube.What is the sum of lengths of all its edges?

    • 24cm

    • 32cm

    • 48cm

    • 64cm

    • 52cm

    Correct Answer
    A. 48cm
    Explanation
    The volume of a cube is found by multiplying the length of one of its edges by itself three times. In this case, if the volume is 64cm^3, then the length of one edge is the cube root of 64, which is 4cm. Since a cube has 12 edges of equal length, the sum of the lengths of all its edges would be 12 times the length of one edge, which is 12 * 4cm = 48cm.

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  • 9. 

    Which is 'not' a integer?

    • (3)-5

    • (-3)-5

    • (1/3)-5

    • (1+3)-5

    • (1-3)-5

    Correct Answer
    A. (3)-5
    Explanation
    The expression (3)-5 is not a valid mathematical expression. The correct way to write it would be 3 - 5. Therefore, (3)-5 is not an integer.

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  • 10. 

    (3)20+(3)20+(3)20+

    • (9)60

    • (9)20

    • (9)40

    • (3)60

    • (3)21

    Correct Answer
    A. (3)21
    Explanation
    The given expression consists of multiple terms, each enclosed in parentheses and separated by a plus sign. Each term is a multiplication of a number inside the parentheses with a number outside the parentheses. The expression can be simplified by performing the multiplications first and then adding the results. In this case, we have (3)20 + (3)20 + (3)20, which simplifies to 60 + 60 + 60 = 180. Therefore, the correct answer is 180.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 07, 2010
    Quiz Created by
    Harshit95
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