Question

How many non perfect square numbers lie between 450² and 451²

Answer 1

450 and 451 are two consecutive integers, all the numbers between 450 amd 451 are non perfect squares.

So, when number of non perfect squares are asked between two consecutive numbers, it is always 2 x smaller no.

therefore, 2 x 450=900

So, there are 900 non perfect squares between 450^2 and 451^2.