Question

Its an mind teasing question which i cant find so..​

Answer 1

Your answer is

520

Hope it helps you

Answer 2

4 + 5 = 58.

Matched well with similar equation

2 + 3 = 36.

Here the last number should be written first and Added by 4.

1 + 2 = 21 and 3+4 = 34. Here the first number is odd. Therefore might not be added by 4.