How to use it
- Compute several organized cases.
- Identify what changes and what stays fixed.
- State a conjecture and test more cases.
See it in action
Odd numbers 1+3+5+7=16 suggests the sum of first n odd numbers is n² for n=4.
How to verify it
Test n=5: add 9 to get 25.
Common mistake
Examples suggest a rule; they are not by themselves a proof for all cases.