Earlier this year five young people decided they wanted to join a military service.

Who signed up to which service in which month and how old are they?

Ages: 16, 17, 18, 19, 20

Months: March, April, May, June, July

1. How the person signed up to join the SAS is a mystery; was this Geoff?

2. The 18 year old signed up 3 months before the 19 year old.

3. Alice is 2 years younger than the person who signed up to the navy.

4. Brian signed up 2 months after the girl who signed up to the army.

5. Jill signed up 2 months after the 16 year old (not Alec) who signed up a month after Alice.

6. Brian signed up the month after the person who signed up to the marines.

7. The person who signed up to the marines signed up 2 months after Alec.

8. Brian, who is not 20, is older than Alec.

9. The 19 year old signed up 1 month before the person that signed up to the SAS.

10. Did Alice join the Air force?