2. How many number of non-perfect square numbers there between 12by2 and 13by2
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Answer: 24 numbers
Let us consider the square of the given two numbers
122 = 12 × 12
122 = 144
132 = 13 × 13
132 = 169
Numbers lies between 169 and 144 are
145,146,147,148,149, 150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168.
∴ Total 24 numbers lies between 144 and 169.
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