Question

please help me solving the question V

Answer 1

Last digit is 7 and 7 comes in cubes of those numbers which end with 3.
There are 5 digits in 79507 so it will be cube of two digit no. And it will be between 40 and 50 as cube of 40 is 64000 and cube of 50 is 125000.
And only the no. which end up with 3 between 40 and 50 is 43. So answer would be 43.

Answer 2

3^3 = 27
So the no. Will be the cube of an odd no.