By what least number should 720 be multiplied so that the resulting number is a perfect square.
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By Prime Factorisation
720=2×2×2×2×5×3×3
Make Pair Of numbers
Pairing(2×2)=2
Pairing (2×2)=2
Pairing(3×3)=3
Pairing(5×?)=5
So we have to Multiply By 1 more 5 to get perfect square
So Multiply 720×5
720×5=3600
And 3600 is Square root of =60
YOUR ANSWER=5
By Prime Factorisation
720=2×2×2×2×5×3×3
Make Pair Of numbers
Pairing(2×2)=2
Pairing (2×2)=2
Pairing(3×3)=3
Pairing(5×?)=5
So we have to Multiply By 1 more 5 to get perfect square
So Multiply 720×5
720×5=3600
And 3600 is Square root of =60
YOUR ANSWER=5
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