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
When you encounter a puzzle like this, try the following approach:
- Don’t assume the symbols have their normal mathematical meaning.
- Compare all of the examples.
- Look for repeated relationships.
- Try subtraction, multiplication, division, or combinations of operations.
- Check whether the answer might be made by joining two separate results.
- Test your theory against every example.
- Choose the simplest rule that consistently
