Thinking Skills
Ari, Bo and Cal each have 24 beads. They take turns: even means give that many to each of the other two; odd …
Question 1 · Multiple choice
Question
Ari, Bo and Cal each have 24 beads. They take turns: even means give that many to each of the other two; odd means receive that many from each. Ari spins 2. Bo spins 3. If they end with 19, 34 and 19, what did Cal spin?
Options
- A. 1
- B. 2
- C. 3
- D. 4
Correct answer
B. 2
Explanation
After Ari 2 (even, gives 2): Ari 20, Bo 26, Cal 26. After Bo 3 (odd, receives 3): Ari 17, Bo 32, Cal 23. We need (19, 34, 19). Cal must go from 23 to 19 (lose 4). Losing 4 means he gave 2 to each, so he spun a 2.