Tom is 6. He is three years older rhab Claire and twice as old as Jack. Gareth is one year older than Jack. Gareth has a twin sister, Morwen

To solve this problem, let's break it down step by step:

1. We are given that Tom is 6 years old.
2. We are also given that Tom is three years older than Claire. This means that Claire's age can be found by subtracting 3 from Tom's age. Therefore, Claire is 6 - 3 = 3 years old.
3. Additionally, we know that Tom is twice as old as Jack. To determine Jack's age, we can divide Tom's age by 2. Therefore, Jack is 6 / 2 = 3 years old.
4. The problem states that Gareth is one year older than Jack. So, Gareth's age can be found by adding 1 to Jack's age. Therefore, Gareth is 3 + 1 = 4 years old.
5. Finally, we are informed that Gareth has a twin sister named Morwen, but we are not given her age.

In summary, based on the given information:
- Tom is 6 years old.
- Claire is 3 years old.
- Jack is 3 years old.
- Gareth is 4 years old.
- Morwen's age is unknown.