Here's a Problem of the Week based on a puzzle you might have heard of before, with a slight twist to make it more interesting. Have a go at it!
Like always, I've written up a solution to this problem, which you can read below.
Did you find the answer a different way? Was a result like this what you expected? Let us know in the comments section!
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ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteI think 13/27 is a correct answer.
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ReplyDeleteI guess it is 13/27.
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I don't agree with the previous comments in this section.
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