Question
What will come in place of the question mark (?) in the
following series? 15, 16, 25, 50, 99, 180, ?Solution
15 + 12 = 16 16 + 32 = 25 25 + 52 = 50 50 + 72 = 99 99 + 92 = 180 180 + 112 = 301
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