Time for another puzzle! This week, we have another shape puzzle. We do shape puzzles every day, and I’ve been very pleased with their effect on a child’s mental model of variables.

Click on the picture to get a printable pdf:

And here’s the solution:

Another Monday, another puzzle! This week, we have a magic square, but a trickier one. In this puzzle, you aren’t immediately given a complete row or column, so you can’t simply solve for the common sum and then solve for all the other entries. There’s a trick to these… can you figure it out?

Click on the image to get a copy of the pdf:

And here’s the solution:

Sorry I’ve missed the last two weeks﹣we’ve been a bit too busy around here! I’ll try to keep up with the puzzles (and other posts) moving forward.

This week’s puzzle is a crossword. This one uses multiplication as well as addition and subtraction:

Click on the puzzle to open a pdf file.

And here’s the solution: