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Squares of 16, 15, 14, 13.
A sequence of squares: n to the nth power
225 (15 squared)256 (16 squared)289 (17 squared)324 (18 squared)
to find the no. of non prefect squares is the square of 15 is 225 and the square of 16 is 256. We need to subtract the square of 15 and 16 256 ( 16 ) -225 (15 )= 31 Therefore there are 31 non perfect squares. Hop you understand
256