Thinking Skills
Ivor, Jen and Kip each have 18 beads. They take turns: even means give that many to each of the other two; od…
Question 1 · Multiple choice
Question
Ivor, Jen and Kip each have 18 beads. They take turns: even means give that many to each of the other two; odd means receive that many from each. Ivor spins 4. Jen spins 1. If they end with 11, 26 and 17, what did Kip spin?
Options
- A. 1
- B. 2
- C. 3
- D. 4
Correct answer
B. 2
Explanation
After Ivor 4 (even, gives 4): Ivor 10, Jen 22, Kip 22. After Jen 1 (odd, receives 1): Ivor 9, Jen 24, Kip 21. We need (11, 26, 17). Kip must go from 21 to 17 (lose 4). Losing 4 means he gave 2 to each, so he spun a 2.