Q.1: The cube of 4 is _________.
a) 16
b) 64
c) 12
Q.2: Which of the following is the smallest Hardy-Ramanujan number ?
a) 1774
b) 1724
c) 1729
Q.3: The smallest number by which 135 must be divided, in order to get a perfect cube is ____________.
a) 4
b) 3
c) 5
Q.4: Numbers obtained when a number is multiplied by itself three times is known as ________ numbers.
a) cube
b) square
c) none
Q.5: Is 243 a perfect cube ?
a) Yes
b) No
c) Can’t say
Q.6: Which is the smallest three-digit perfect cube number ?
a) 125
b) 100
c) 343
Q.7: What will be the unit digit of a number having ‘3’ at its ones place ?
a) 9
b) 7
c) 3
Q.8: 729 is the cube of _____.
a) 8
b) 6
c) 9
Q.9: Which of the following is true for any natural number ?
a) square of ‘a’ is greater than cube of ‘a’
b) square of ‘a’ is lesser than cube of ‘a’
c) square of ‘a’ is equal to cube of ‘a’
Q.10: What is the volume of a cube whose edge is 5 cm ?
a) 125
b) 250
c) 300
Q.11: How many zeroes will be there in the cube of 40 ?
a) two
b) three
c) four
Q.12: Which of the following smallest number has to be multiplied with 675 in order to get a perfect cube ?
a) 3
b) 7
c) 5
Q.13: The cube root of 0.027 is _________
a) 0.3
b) 0.03
c) 0.003
Q.14: The one’s digit of the cube of 888 is _________.
a) 2
b) 8
c) 6
Q.15: Each prime factor appears ________ times in its cubes.
a) two
b) three
c) four
Q.16: The smallest number which has to be multiplied with 392 in order to get a perfect cube is __________.
a) 2
b) 5
c) 7
Q.17: The cube of even numbers is always _________.
a) even
b) odd
c) both
Q.18: The cube of 11 is __________.
a) 1331
b) 1221
c) 1111
Q.19: Figures which have three-dimensions are called _______ figures.
a) perfect
b) solid
c) regular
Q.20: Check whether 27000000 is a perfect cube or not ?
a) Yes, it is a perfect cube
b) No, it is not a perfect cube
c) Can’t say
Answers:
- b
- c
- c
- a
- b
- a
- b
- c
- b
- a
- b
- c
- a
- a
- b
- c
- a
- a
- b
- a
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