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