They are: 9, 16 and 25
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The smallest perfect squares that end with 9 are 9 (the square of 3) 49 (the square of 7). Their difference is 40.
101
No- the closest perfect squares are 36 (perfect square of 6) and 49 (perfect square of 7)
Itself or 7 because 700*700 = 490,000 and 700*7 = 4,900 both of which are perfect squares
In terms of prime factors, 1008 = 24*32*7 Then since 24 and 32 are perfect squares, all that is required is to make 7q a perfect square and so q = 7.