Question
Find the wrong number in the given number series.
15, 195, 575, 1155, 1935, 2915Solution
42 – 1 = 15 142 – 1 = 195 242 – 1 = 575 342 – 1 = 1155 442 – 1 = 1935 542 – 1 = 2915 Therefore, the series is correct.
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