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    OlympiadEasyNumber Theory5–6

    Perfect Squares

    Quadrados Perfeitos

    How many perfect squares are there between 1 and 200?

    Find the largest n such that n^{2} \le 200.

    Solution

    Step 1 of 3

    1. 1.1^{2} = 1, 2^{2} = 4, \ldots, 14^{2} = 196, 15^{2} = 225 > 200.