18 Brain Teasers Worksheets - Free Printable

Let's solve this critical thinking puzzle step by step using the clues provided.

We are told:
- Emily, Anthony, Sarah, and Winston are all different ages.
- Their ages range from 8 to 11 years old, so each person is one of: 8, 9, 10, or 11.
- Each age is used exactly once (since all are different).

Clues:

1. Sarah’s age is an odd number.
2. Emily is younger than Sarah.
3. Anthony is the oldest child.

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Step 1: Use Clue 3 — Anthony is the oldest child.

Since the ages go from 8 to 11, the oldest possible age is 11.

✔ So, Anthony = 11

Now we eliminate 11 for the others.

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Step 2: Use Clue 1 — Sarah’s age is an odd number.

Odd numbers between 8 and 11: 9 and 11

But 11 is already taken by Anthony.

So Sarah must be 9 years old.

✔ Sarah = 9

Now eliminate 9 for others.

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Step 3: Use Clue 2 — Emily is younger than Sarah.

Sarah is 9 → Emily must be younger than 9, so Emily’s age must be 8 (since 10 and 11 are taken, and 9 is Sarah’s).

Available ages now: 8, 10

But Emily must be younger than Sarah (9), so Emily = 8

✔ Emily = 8

Then the only remaining age is 10, which must belong to Winston.

✔ Winston = 10

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Final Answer:

| Name | Age |
|----------|-----|
| Emily | 8 |
| Anthony | 11 |
| Sarah | 9 |
| Winston | 10 |

---

Now fill in the grid:

We mark an "X" or a checkmark in the correct column for each person.

```
8 9 10 11
Emily X - - -
Anthony - - - X
Sarah - X - -
Winston - - X -
```

So, in the table:

- Emily → 8
- Anthony → 11
- Sarah → 9
- Winston → 10

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✔ Solution Summary:

- Emily: 8
- Anthony: 11
- Sarah: 9
- Winston: 10

This satisfies all clues:
1. Sarah’s age (9) is odd ✔
2. Emily (8) is younger than Sarah (9) ✔
3. Anthony (11) is the oldest ✔

All ages are unique and within 8–11 ✔

✔ Puzzle solved!