Question

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series: 3, 4, 7, 13, 13, 21, 31, 34, ?

• A. 42
• B. 43
• C. 51
• D. 52

Hint:

Try grouping series into alternating sub-patterns.

Answer 1

The Correct Option is D

Step 1: Observe alternating pattern of addition.
Step 2: Differences follow: +1, +3, +6, 0, +8, +10, +3.
Step 3: Continuing the pattern gives: 34 + 18 = 52