Find the next number in the series: 7, 10, 15, 22, 33, 46, ?

A61

B68

C55

D63 ✓ Correct

Correct answer: (D) 63

Explanation

The next number is 63.

Differences are 3, 5, 7, 11, 13, consecutive primes.

10-7=3, 15-10=5, 22-15=7.

33-22=11, 46-33=13, next prime 17.

46 + 17 = 63.

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