What is a Hypercard?
The late Martin Gardner, in addition to being an amateur magician, wrote dozens of books on mathematical games, puzzles, and other discoveries. In the 1970s, he popularized an amazing “impossible object” known as a hypercard.
You can create a hypercard by making a few simple cuts in an ordinary playing card. No glue, tape, or adhesive is required!
A complete hypercard is shown in this image. As you can see, the tab of the hypercard sticks up at a peculiar angle from the rest of the card. This is accomplished by a secret move that only takes a second to do.
Try to figure out how the hypercard “works” without experimenting first. If you figure it out, great. If not, see how it's done.