Question
What number should logically replace the question mark?

A. 8
B. 9
C. 7
D. 4
Answer: D. 4
Solution:
Logic::
The lower right number is the sum of the other two divided by eight.
First Triangle: (39 + 17) ÷ 8 = 7
Second Triangle: (19 + 53) ÷ 8 = 9
Third Triangle : (18 + 14) ÷ 8
= 4.
Hence, The answer is 4.