Question
Select the number from the given option that can replace
the question mark [?] in the following series. 515, 517, 520, 525, 532, 543, 556, ?Solution
The logic followed here is as follows, Starting from the left end, prime numbers starting from 2 are added to each number successively to get the next number. 515 + 2 = 517 517 + 3 = 520 520 + 5 = 525 525 + 7 = 532 532 + 11 = 543 543 + 13 = 556 556 + 17 = 573
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