Question

1280 when divided by a smallest number becomes perfect square

Answer 1

prime factor of 1280 is
2×2×2×2×2×2×2×2 ×5
here,
$\sqrt{2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 5 } \\ \\ 2 \times 2 \times 2 \times 2 \sqrt{5}$
5 is left to he paired if we removed 5 by divided it by 5 it will be a perfect square