Try
52
Explanation:
Tens digit
is the larger of the two numbers on the LHS, i.e. 5
Units digit
Goes from 1 --(+2+3)(mod10)-> 6 --(+3+4)(mod10)-> 3 --(+4+5)(mod10)-> 2
Omega Krypton
- 21.7k
- 2
- 26
- 125