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What will come in place of question mark (?) in the following number series ?8, 17, 42, 91, ??
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By: anil on 05 May 2019 01.26 am
The difference between consecutive terms of the number series are squares of odd natural numbers. For example, 17-8 = 9
42-17 = 25
91-42 = 49 Hence, the number to come next is 91+81 = 172
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42-17 = 25
91-42 = 49 Hence, the number to come next is 91+81 = 172