Six.
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36 is the only perfect square amongst those listed.
36
The square root of a perfect square is a whole number. Example sqrt(36) = 6 so 36 is a perfect square Example sqrt(25) = 5 so 25 is a perfect square Example sqrt(8)= 2.828 which is not whole so 8 is not a perfect square
There are two: 25 and 36.
NO!!! However '36' is a perfect 'square' 6 x 6 = 36