Can I double check this I'm not entirely sure if my answer is correct.

What is the smallest perfect square that has a factor of 90.

8100?

1 answer

90 = 2x3x3x5

since each pair of equal factors produces a perfect square, we have 3x3, a perfect square.
So all we need is another 2 and another 5

How about 2x2x3x3x5x5 = 900

900 = 30^2 , so it is a perfect square, and it is divisible by 90
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