Question
Select the number from the given option that can replace
the question mark (?) in the following series: 51, 81, 123, 179, ?, 341Solution
51 + [5² + 5] = 51 + 30 = 81 81 + [6² + 6] = 81 + 42 = 123 123 + [7² + 7] = 123 + 56 = 179 179 + [8² + 8] = 179 + 72 = 251 251 + [9² + 9] = 251 + 90 = 341
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