What number should replace the question mark in the series: 5, 9, 15, 23, 33, ?

A43

B45 ✓ Correct

C56

D66

Correct answer: (B) 45

Explanation

The next term is 45.

The differences increase by 2 each time.

5 (+4) 9 (+6) 15 (+8) 23 (+10) 33.

The next difference is +12.

33 + 12 = 45.

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