find the least number that is to be subtracted from 4000 to make it perfect sqare
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Here, 123 X 3 = 369 is less than 400
124 X 4 = 496 is more than 400
Hence, the required difference = 400 - 369 = 31
4000 - 31 = 3969 is a perfect square.
124 X 4 = 496 is more than 400
Hence, the required difference = 400 - 369 = 31
4000 - 31 = 3969 is a perfect square.
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