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On Wednesday, I posted this problem:
On Wednesday, I posted this problem:
Matching Socks
Matching Socks
I'm warning you - this one might trick you. Be careful.
You have a drawer with 10 red socks and 20 blue socks. It is very dark so you can't see anything.
How many socks should you pull out in order to guarantee that you will have a pair that match?
Click here if you still need to submit the problem or check your feedback from me.
Click here if you still need to submit the problem or check your feedback from me.
Then click these links to see Natalie's proof.
Then click these links to see Natalie's proof.
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