Problem 5 · 2011 Math Kangaroo
Easy
Logic & Word Problems
casework
Maria describes one of these five shapes in the following way: “It is not a square. It is grey. It is either round or three‑sided.” Which shape did she describe?
Show answer
Answer: B — B
Show hints
Hint 1 of 2
Use each clue to cross shapes off the list.
Still stuck? Show hint 2 →
Hint 2 of 2
Keep only the shape that is not a square, is grey, and is round or three-sided.
Show solution
Approach: eliminate by each clue
- “Not a square” removes the two squares (A and C).
- “It is grey” removes the white circle (D); “round or three-sided” removes the grey rectangle (E).
- The only shape left is the grey triangle, B.
Mark:
· log in to save