Page 2 - CL-8 -CH-6 (CBQ)
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perfect cube. . (T/F)
Answer: T
5 When the square of a number is subtracted from the cube of the same number, it
becomes 100. Find the number.
A.1
B. 2
C. 4
D. 5
Answer: D. 5
6 By---------------- number should we divide 135 to get a perfect cube?
Answer: 5
7 Cube root of 512 is:---------------
Answer: 8
8 The cube root of 13824 is __________.
Answer: C. 24
9 Find the smallest number by which 2560 must be multiplied so that the product is a
perfect cube.
Answer: . 25
10 Prove that if a number is doubled, then its cube is eight times the cube of the given
number.
11 Assertion (A): The one’s digit in the cube root of the cube number 1728 is 6.
Reason (R): The cube root of a number is the factor that we multiply by itself three times
to get that number
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
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