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Four Triangles Puzzle

Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?

Cut it Out

Can you dissect an equilateral triangle into 6 smaller ones? What number of smaller equilateral triangles is it NOT possible to dissect a larger equilateral triangle into?

Zios and Zepts

Age 7 to 11
Challenge Level

Drawing some pictures or using sticks/counters for legs might help.
Do you have any idea approximately how many Zios and Zepts there might be to make $52$ legs?
You could try choosing a certain number of Zios and a certain number of Zepts, then count their legs. Do you need more legs or fewer to have a total of $52$?