The answer is 61.
The pattern relies on squaring both numbers and then adding those squares together (a² + b²).
Here is the pattern applied to each row:
2 + 3 = 13: 2² + 3² = 4 + 9 = 13
3 + 4 = 25: 3² + 4² = 9 + 16 = 25
4 + 5 = 41: 4² + 5² = 16 + 25 = 41
Following this exact rule for the final equation:
