This is a blog of randomly different things I find interesting, curious etc. The Puzzles - most of them are intended to be instructive - suggesting a principle/approach. With some of them which appear too easy, there is a usually a brute force approach and an elegant approach, the latter being the one I am looking for. Feel free to ping me at iyengar73@gmail.com to ask for hints/answers. Please do not post answers on the comments to avoid spoilers to others. Thanks and happy solving!
Monday, July 11, 2011
Puzzle 4: White and black balls
There are 100 white and 100 black balls in a bin. You take out two balls at a time. If both are the same colour you replace them with a black ball. If they are different, you replace them with a white one. When you are down to one ball, what is the colour of that one ball? (No answers on comments please :))
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