Thinking Skills
Tess, Uma and Val each have 20 beads. They take turns: even means give that many to each of the other two; od…
Question 1 · Multiple choice
Question
Tess, Uma and Val each have 20 beads. They take turns: even means give that many to each of the other two; odd means receive that many from each. Tess spins 2. Uma spins 3. If they end with 12, 27 and 21, what did Val spin?
Options
- A. 1
- B. 2
- C. 3
- D. 4
Correct answer
A. 1
Explanation
After Tess 2 (even, gives 2): Tess 16, Uma 22, Val 22. After Uma 3 (odd, receives 3): Tess 13, Uma 28, Val 19. We need (12, 27, 21). Val must go from 19 to 21 (gain 2). Gaining 2 means she received 1 from each, so she spun a 1.