Question 20
Eight cards are numbered $1$ through $8$. An, Binh and Chau each draw two cards.
• Binh: one card’s number is twice the other’s.
• Chau: the two numbers sum to $9$.
• An: the two numbers sum to $7$, but their difference is not $3$.
Which two cards remain?
• Binh: one card’s number is twice the other’s.
• Chau: the two numbers sum to $9$.
• An: the two numbers sum to $7$, but their difference is not $3$.
Which two cards remain?