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Cheryl's Birthday

Pirata

All American
Dec 21, 2009
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I suspect some of you have seen this already. It went viral some time ago. I was shown it last night.

If you have not seen it, don't cheat. The solution is easily found on Google and YouTube.



cheryl-birthday-puzzle-math-viral-blog.jpg
 
Got it. Last part tripped me up for a minute. That was a good one.

Work on what it can't be first @shu09
 
Last edited:
Nine balls. Equal in appearance but one is heavier than the other 8.

What is the least number of weighings needed to determine which ball is heavier?



89XquF
 
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Probably would have went with 3, but there is a hint there which got me to 2.
 
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