Question

Find the Missing Number:
3, 4, 7, 8, 11, 12, .........

• A. 7
• B. 10
• C. 14
• D. 15

Hint:

In number series problems, check for alternating patterns in the differences between terms. The sequence may follow a repeated pattern like +1, +3, etc.

Answer 1

The Correct Option is D

Let's analyze the pattern in the sequence:
- From 3 to 4, the difference is +1.
- From 4 to 7, the difference is +3.
- From 7 to 8, the difference is +1.
- From 8 to 11, the difference is +3.
- From 11 to 12, the difference is +1.
The differences alternate between +1 and +3.
Following this pattern, the next difference should be +3: \[ 12 + 3 = 15 \] Thus, the missing number is \( \boxed{15} \).
Therefore, the correct answer is \( \boxed{4} \).