You can solve this math equation using your brain. Solve the puzzles and improve your logical thinking.
Puzzle:
1 + 2 = 3
3 + 4 = 21
5 + 6 = 55
4 + 5 = ?

Options:
A. 32
B. 34
C. 36
D. 38
Answer: C. 36
Solution:
1 + 2 = 1 × (1+2) = 3
3 + 4 = 3 x (3+4) = 21
5 + 6 = 5 x (5+6) = 55
4 + 5 = 4 x (4+5) = 36