Question
Find the wrong number in the given number series.
253, 542, 216, 579, 179, 620Solution
ATQ, 253 + (17)2 = 542 542 - (18)2 = 218 218 + (19)2 = 579 579 - (20)2 = 179 179 + (21Â 2 = 620 Therefore, 218 should come in place of 216
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