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What will come in place of question mark (?) in the following number series? 4, 3, 4, 7, 15, ?

Correct Answer: 44

Explanation:

  4             3             4             7               15        ?
×1-1      ×1+1       ×2-1       ×2+1           ×3-1


 


15x3 - 1 = 45 - 1 = 44


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