If 5 + 8 = 14, 9 + 6 = 21, and 4 + 10 = 13, then 7 + 2 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 15.
The logic used here is:
5 + 8 = 14
5 × 2 + 8 - (8 ÷ 2) = 10 + 8 - 4 = 18 - 4 = 14
9 + 6 = 21
9 × 2 + 6 - (6 ÷ 2) = 18 + 6 - 3 = 24 - 3 = 21
4 + 10 = 13
4 × 2 + 10 - (10 ÷ 2) = 8 + 10 - 5 = 18 - 5 = 13
Similarly;
7 + 2 = ?
7 × 2 + 2 - (2 ÷ 2) = 14 + 2 - 1 = 16 - 1 = 15