So it's been, like, 3 hours since my last post, so I figured the time is ripe for a new one.
In class, I said that I'm a fan of number puzzles. As such, I present my favorite number puzzles of all time:
Kenkens (Mathdoku)
A Kenken puzzle is like a Sudoku puzzle - 1-6 in every row and column. However, the grid is divided up into sections. In each section, there is an operator and a number. The numbers in each section must perform the operation to get that number. E.g -"5" means the two number must subtract to make 5, or "x6" means the numbers must multiply to 6. Puzzle sizes go from 1-4 to 1-9.
These puzzles are probably my second biggest time sink after Reddit, and I love pounding them out on the bus on the way to class.
#playtpus
I clicked your link and I am now a fan of these as well! I've seen them every once in a while in a US Today or something but they are always super small so now that I know they have 9x9 I am going to be doing these a lot over spring break.
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