1. Think of a twodigit number. 2. Add the two digits of your number together. 3. Subtract this sum from your original twodigit number and then concentrate on your answer picture. 4. After concentrating on the picture for a while click the button below. Read My MindIs this the picture you had in mind? Now that's what you call mind reading! Was it just a coincidence or is there a mathematical explanation? Click the button below for another go. Try again 


This Mystical Mathematical Mind Reader is based on The Flash Mind Reader by Andy Naughton. There are other mathematical magic tricks to be found on the Transum Mathemagic page. Would you like to know how this trick works? The maths behind this trickery and solutions to other Transum puzzles, exercises and activities are available here when you are signed in to your Transum subscription account. If you do not yet have an account and you are a teacher, tutor or parent you can apply for one here. A Transum subscription also gives you access to the 'Class Admin' student management system, downloadable worksheets, many more teaching resources and opens up adfree access to the Transum website for you and your pupils. 

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments. 
Sound effect from freesound.org Creative Commons licence Robinhood76 06741 'good news magic ding'
Patrick, Sydney
Tuesday, January 12, 2021
"I really appreciate that you have redone this mathemagics trick.
I love to it at the start of the year.
Is there anyway you could put sounds in  like the older flash version?
Apologies if you already have, but I can't hear them.
[Transum: Yes there is a sound effect when the picture is revealed. I'm not sure why you can't hear it.]"
Dara, The Netherlands
Saturday, December 23, 2023
"Did anyone get a wrong answer from the mindreader? Or does anyone know how it works?"