Question

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

• A. 78
• B. 79
• C. 80
• D. 77

Answer 1

Answer:

B. 79

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