Dawn's answer to Kaviya's Secondary 1 Maths Singapore question.

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Dawn
Dawn's answer
21 answers (Tutor Details)
1st
30800m is a perfect square
30800 = 2 x 2 x 2 x 2 x 5 x 5 x 7 x 11

To make a perfect square, all factors must be in pairs
Hence, to make 30800m a perfect square,
m = 7 X 11 = 77