Question

Find the smallest number which must be multiplied in 686 to get a perfect cube number. Also find the cube root of the product. please tell fast

Answer 1

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$\mathcal{Prime\: factors\: of\: 686:\: 2×7×7×7}$

$\mathcal{To\: get\: a\: perfect\: cube ×2\: or\: ÷2= ×\frac{1}{2}}$

$\mathcal{Therefore, \:required\: no.\: is\: {\Large{\frac{1}{2}}}\: or\: 2}$

Hope it helps úh