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What should come in place of the question mark (?) in the given series? 39,47, 55, 63, 71,?

A78

B79

C80

D77

Answer:

B. 79

Read Explanation:

Look at the pattern:

39 → 47 → 55 → 63 → 71

Each step increases by +8:

  • 39 + 8 = 47

  • 47 + 8 = 55

  • 55 + 8 = 63

  • 63 + 8 = 71

So,
71 + 8 = 79


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