Thinking Skills
Tia, Uma and Vic each have 22 chips. They take turns: showing an even number means give that many to each of …
Question 1 · Multiple choice
Question
Tia, Uma and Vic each have 22 chips. They take turns: showing an even number means give that many to each of the other two; odd means receive that many from each. Tia spins 4. Uma spins 1. If they end with 12, 27 and 27 respectively (Tia, Uma, Vic), what did Vic spin?
Options
- A. 1
- B. 2
- C. 3
- D. 4
Correct answer
A. 1
Explanation
After Tia 4 (even): gives 4 to each. Tia 14, Uma 26, Vic 26. After Uma 1 (odd): receives 1 from each. Tia 13, Uma 28, Vic 25. To reach (12, 27, 27), Vic must receive 1 from Tia and 1 from Uma. This happens when Vic spins 1 (an odd number). Tia 13-1=12, Uma 28-1=27, Vic 25+2=27. So Vic spun 1.