The smallest number by which 72 must be multiplied to obtain a perfect cube is:
3
2
4
6
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Finding prime factors of 72
72 = (2 x 2 x 2) x 3 x 3
Since the prime factor 3 is not in pair.
The given number should be multiplied by 3.
Hence, option 1 is the correct option.
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The cube of 0.5 is:
1.25
0.125
12.5
0.0125
The cube of -4 is:
16
12
-64
64
The smallest number by which 81 be divided to obtain a perfect cube is :
1
9
none of the above
Find the cube of 7.
