find the least number which must be added to 2945 to obtain a perfect square. find the perfect square and it's s square root
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find the square root of 2945 by long division method, reminder is 29 and the quotient is 54.
54² < 2945 > 55²
2916 < 2945 > 3025
now,
3025 - 2945 = 80
∴ 80 must be added to 2945 to get a perfect square.
3025 is a perfect square no.
√3025 = 55
∵ square root of perfect square no. is 55
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