What number can replace the question mark in the series: 3, 9, 17, 27, 39, ?

A50

B55

C53 ✓ Correct

D59

Correct answer: (C) 53

Explanation

The next term is 53.

The differences rise by 2 each step.

3 (+6) 9 (+8) 17 (+10) 27 (+12) 39.

The next difference is +14.

39 + 14 = 53.

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