Question

In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces.

9, 11, 20, 31, (.), 82

• A. 41
• B. 51
• C. 60
• D. 71

Answer 1

Answer: (B)

51

Each term in the series is the sum of the preceding two terms.
$\therefore$ Missing number = 20 + 31 = 51.