If: 1 + 2 = 5, 2 + 3 = 13, 3 + 4 = 25 Then, 4 + 5 = ?
- 35
- 38
- 41
- None of these
Explanation
Look at the pattern:
1 + 2 = 5
1 square + 2 square = 1 + 4 = 5
2 + 3 = 13
2 square + 3 square = 4 + 9 = 13
3 + 4 = 25
3 square + 4 square = 9 + 16 = 25
So the rule is: a + b = a square + b square
Now find 4 + 5
4 square + 5 square = 16 + 25 = 41
Last verified on 12-07-2026
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