the others.
The strongest solution is normally the one that explains all of the examples consistently.
In this puzzle, the difference-followed-by-sum rule works for every equation:
- 6 + 4 → 2 and 10 → 210
- 9 + 2 → 7 and 11 → 711
- 8 + 5 → 3 and 13 → 313
- 5 + 2 → 3 and 7 → 37
- 7 + 6 → 1 and 13 → 113
Try Creating Your Own Puzzle
Once you understand the pattern, you can create your own.
For example:
12 + 7 = ?
Difference:
12 − 7 = 5
Sum:
12 + 7 = 19
Final answer:
519
Another example:
15 + 9 = ?
