Question

what is the logic?
answer is 35​

Answer 1

Explanation :

(2×2)-1 = 4-1=3

(4×4)-1 = 16-1 =15

(6×6)-1 = 36-1 = 35

(8×8)-1 = 64-1 = 63

(10×10)-1 = 100-1 = 99

(12×12)-1 = 144-1 = 143