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Question-117172




Question Number 117172 by zakirullah last updated on 10/Oct/20
Answered by $@y@m last updated on 10/Oct/20
21168=2×2×2×2×3×3×3×7×7  3 has no pair.  ∴ 21168 must be divided by 3  to yield perfect square.
$$\mathrm{21168}=\mathrm{2}×\mathrm{2}×\mathrm{2}×\mathrm{2}×\mathrm{3}×\mathrm{3}×\mathrm{3}×\mathrm{7}×\mathrm{7} \\ $$$$\mathrm{3}\:{has}\:{no}\:{pair}. \\ $$$$\therefore\:\mathrm{21168}\:{must}\:{be}\:{divided}\:{by}\:\mathrm{3} \\ $$$${to}\:{yield}\:{perfect}\:{square}. \\ $$

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