Question

What should come in place of the question mark (?) in the given series? 7 10 13 22 25 ?

• A. 46
• B. 42
• C. 48
• D. 54

Answer 1

Answer:

A. 46

The number 46 should come in place of the question mark (?).

The given sequence is an alternating series formed by combining two separate logical progressions:

1. First Series (Odd positions): 7, 13, 25

* $7 + \mathbf{6} = 13$

* $13 + \mathbf{12} = 25$

* Pattern: The difference doubles each time ($6 \times 2 = 12$).

2. Second Series (Even positions): 10, 22, ?

* $10 + \mathbf{12} = 22$

* Following the same doubling logic as the first series, the next difference must be $12 \times 2 = \mathbf{24}$.

* Therefore, the next number is: $22 + 24 = \mathbf{46}$.