Cube.. but not 3D

Number Theory Level 3

Amongst the options, what is the smallest integer value of n n which would make 864 × n 864 \times n a perfect cube?

-4 2 4 -2

Manish Mayank by Manish Mayank , 20, India

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1 solution

Manish Mayank
Jun 10, 2014

Multiplying by 2 & -2 both are perfect cube but -2 is smaller

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Yeah...good trick..had you made it as non-mcq type question...i wud be a sure-shot level 3

Krishna Ar - 6 years, 10 months ago

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