Toys
Jonathan has a collection of wooden toys. Some are cubes and some are spheres, some are red and some are blue.
It is known that there are more spheres than cubes, and it is known that there are more blue toys than red toys.
Prove that Jonathan has a blue sphere.
Difficulty level (1 very easy - 10 very hard): 2
Topics:
Combinatorics
->
Pigeonhole Principle
Logic
->
Reasoning / Logic
Proof and Example
->
Proof by Contradiction
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