By what number must 20 be divided to become a perfect square?

1.	By what number must 20 be divided to become a perfect square?
Answer» <html><body><a href="https://interviewquestions.tuteehub.com/tag/n-568463" style="font-weight:bold;" target="_blank" title="Click to know more about N">N</a>:(i) 252 = 2 x 2 x 3 x 3 x 7Here, prime <a href="https://interviewquestions.tuteehub.com/tag/factor-458892" style="font-weight:bold;" target="_blank" title="Click to know more about FACTOR">FACTOR</a> 7 has no <a href="https://interviewquestions.tuteehub.com/tag/pair-1145723" style="font-weight:bold;" target="_blank" title="Click to know more about PAIR">PAIR</a>. Therefore 252 must be divided by 7 to <a href="https://interviewquestions.tuteehub.com/tag/make-546668" style="font-weight:bold;" target="_blank" title="Click to know more about MAKE">MAKE</a> it a <a href="https://interviewquestions.tuteehub.com/tag/perfect-1150611" style="font-weight:bold;" target="_blank" title="Click to know more about PERFECT">PERFECT</a> square.\therefore252\div7=36∴252÷7=36And \sqrt{36}=2\times3=6 36 =2×3=6</body></html>

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