Tricky Math Equation 21+3 = ? | Only brilliant people solve this math puzzle

Tricky Math Equation: Only brilliant people solve the #math puzzle in 12 seconds!

Explanation:
13+3 = (13×3)+3 = 42 (Reverse the number) = 24

15+5 = (15×5)+5 = 80 (Reverse the number) = 08

17+2 = (17×2)+2 = 36 (Reverse the number) = 63

19+3 =(19×3)+3 = 60 (Reverse the number) = 06

21+3 = (21×3)+3 = 66 (Reverse the number) = 66

Correct answer: 66