In each of the following questions, two numbers are given which follow a certain logical or arithmetic relationship. Identify the same pattern and apply it to find the missing number in the second pair. Choose the correct option from the given alternatives.
15 :8 :: 31 : ?
Show answer & explanation
Correct answer: B
Explanation
15:8:: 31:?
Pattern:
(number + 1) ÷ 2 → (15+1)/2 = 8
So, (31+1)/2 = 16.
Hence, the correct answer is option 2.