Seems some of us can't see a problem without wanting to take a crack at solving it. Does that sound like you?
Good. Forge ahead and ponder this month's problem. We'll post a new one every month, and allow a month for you to submit solutions (we may even publish submitted answers, especially if they're correct).
We usually won't reply individually to submitted solutions but every few days we will update a list of people who answered correctly. At the beginning of the next month, we'll post the answer.
So give your mind a break from its routine---you never know what other problems you may solve in the process!
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IBM Research - Israel
The current puzzlemaster of Ponder This is Gadi Aleksandrowicz. Previous puzzlemasters include Oded Margalit (2007-2020), James Shearer (2005-2009), and Don Coppersmith (1998-2005).
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If you have any problems you think we might enjoy, please send them in. All replies should be sent to: ponder@il.ibm.com