one possible solution.
This happens because people naturally look for different relationships between numbers.
A person might discover a rule that works for one or two examples but fails on 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 = ?
Difference:
15 − 9 = 6
Sum:
15 + 9 = 24
Final answer:
624
You can use the same idea to challenge your friends and family.
Tips for Solving Similar Number Puzzles
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