Question

By what least number 675 be multiplied to obtain a number which is a perfect cube?
a) 5
b) 6
c) 7
d) 8
e) non of these

Answer 1

ans. a) 5

prime factorisation of 675 is 5^2 x 3^3
hence, to make a perfect cube, 675 has to be multiplied by 5