• January 27, 2020


    Here’s a quick little brainteaser for young and old alike! Slice the square into 4 identical sections, so that in each section there is 1 caterpillar with its leaf. One caterpillar will not have a leaf, she is taking a diet. This and many other great geometry puzzles can be found on!
  • January 20, 2020

    Two Geometry Brainteasers!

    When writing fun stuff for my company’s global communications site, sometimes I like to throw in a brainteaser every now and again—especially given that a lot of PTC’s employees and customers are engineers. So here are two geometry puzzles to get those old mental juices flowing! 64 = 65 Geometry Paradox Where does the hole in second triangle come from (the partitions are the same)? Write Numbers Write the numbers from 1 to 8 into the squares, so that the squares with consecutive numbers do not touch (neither edges nor corners). These and other amazing geometry puzzles can be found here on