Thinking · Critical thinking
15 min · pencil
★★☆
Who stole the cookie?
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The last cookie was in the kitchen. Now it is gone! Four friends were each in a different place. The one in the kitchen took it.
- Read a clue. Put ✓ for yes and ✗ for no in the grid.
- One ✓ in a row means ✗ for the rest of that row and column.
- Keep going until each friend has one place.
| Kitchen | Garden | Bedroom | Garage |
|---|
| Ava | | | | |
|---|
| Arjun | | | | |
|---|
| Mei | | | | |
|---|
| Kofi | | | | |
|---|
- Ava was not in the kitchen or the bedroom.
- Kofi was fixing his bike in the garage.
- Mei was not in the kitchen.
- The cookie taker was in the kitchen.
Turn the page upside down to read the hint.
Hint: Start with Kofi. Then where can Ava go?
Grown-up corner
Why it matters: Logic grids train careful, step-by-step reasoning: use only what the clues say, and rule things out.
- Which clue helped you most? Why?
- How do you know your answer is the only one that works?
Extend it: Write your own 3 × 3 mystery for a grown-up to solve.
My brain felt: ☐ easy ☐ just right ☐ stretchy
One thing I learned: ________________________
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