Juan, Carlos, Maria, and Anna each have a number between 5 and 15. Using clues about their numbers, the document solves for what each person's number is. Juan's number is 5, Carlos' number is 6, Maria's number is 9, and Anna's number is 18.

1. Cuatro amigos!
By Janice, Pei Yu and Kinsey
Friday, 24 May, 13

2. Problem
Friday, 24 May, 13

3. SOLVE
J=5,10,15
A=2M==>M<10(J=5)
C=A/3 ==>A=12,18
M>J==>J=5:M>5
J<C ==>5<C
Mcannotbeover10.Aisanevennumberabove10.Factssofar:
J=5
A=12,18
C=4,6
-------------------------
C>5
C=6
6x2=12
A=18
18÷2=9
M=9
Friday, 24 May, 13

4. Answers
Juan’snumberis5
Carlos’numberis6
Maria’snumberis9
Anna’snumberis18
Friday, 24 May, 13