Mathemagic Numbers Cards Generator

Version: 1.1 Date: 2021-01-17

By Fitz and Rajiv

To do this trick, you will need a set of these mathemagic cards. You can generate and print them on the linked page.

The Magic Trick

  1. Ask a member of your audience to think of a whole number betweem 1 and the largest number printed on your set of mathemagic cards.
  2. Show them each of your cards, one by one. Ask them if the number they thought of is on that card.
  3. Once they have answered for each card, you reveal to them what their number is.

How it is Done



Thanks to Vijit Sharma and family for introducing Rajiv and Fitz to this math magic trick. Rajiv and Fitz coauthored the JavaScript here that generates the cards. Fitz figured out the generalized algorithmic pattern of numbers to be generated that works for each card and for any number of cards.