The Mind Reading Trick
Build and perform a simple mind reading trick using number magic, secret codes, and a prediction card to amaze friends while learning logical steps.
Step-by-step guide to build and perform The Mind Reading Trick
Step 1
Gather all your materials and find a quiet spot to perform your trick.
Step 2
Cut a small rectangle from the sheet of paper to make a prediction card.
Step 3
Use the marker to write the number 5 big and clear on the prediction card.
Step 4
Fold the card and tuck it into the small envelope and seal it with tape.
Step 5
Practice the math trick once by picking any number and doing the steps to check the final answer is 5.
Step 6
Ask a friend to pick a secret number between 1 and 20 and to not tell you.
Step 7
Tell your friend to multiply their secret number by 2.
Step 8
Tell your friend to add 10 to the result.
Step 9
Tell your friend to divide that result by 2.
Step 10
Tell your friend to subtract their original secret number and keep the final number secret.
Step 11
Dramatically open the sealed envelope and show your prediction card with the number 5.
Step 12
Ask your friend to reveal their final number to see that it matches your prediction.
Step 13
Share a photo or video of your mind-reading trick on DIY.org so everyone can see your magic!
Final steps
You're almost there! Complete all the steps, bring your creation to life, post it, and conquer the challenge!
Help!?
What can we use if we don't have a small envelope or a marker?
If you don't have a small envelope, fold the prediction card into a small paper pouch and secure it with tape or a paperclip, and if you lack a marker use a pen to write the big clear number 5 on the card as in the instructions.
What should we check if the final revealed number isn't 5?
If the result isn't 5, re-do the practice step and carefully recheck each arithmetic instruction—multiply by 2, add 10, divide by 2, then subtract the original secret number—to catch any calculation mistakes.
How can I change the trick for younger or older kids?
For younger children have an adult read and guide them through each math step or let them use a calculator during the practice step, while older kids can alter the '+10' step to another even number and update the prediction card to match for a harder version.
How can we make the trick more impressive or personal?
Personalize the prediction card with drawings or stickers before folding, add a dramatic reveal when opening the taped envelope, and follow the last instruction to share a photo or video of the trick on DIY.org.
Watch videos on how to build and perform The Mind Reading Trick
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Facts about math-based magic for kids
🧠 Many "mind reading" tricks use math patterns and logic to seem psychic — it’s clever reasoning, not supernatural powers.
🎩 Mentalists use misdirection and audience psychology so people focus on the wrong thing at the right time.
🤝 Performing a simple trick can boost confidence, make friends laugh, and teach step-by-step logical thinking.
🃏 Prediction cards and "forced" choices let performers secretly control an outcome and reveal a surprising prediction.
🔢 The classic 1089 trick turns almost any 3-digit number into 1089 after a few subtraction and reversal steps — try it!
How do I build and perform the Mind Reading Trick using number magic and a prediction card?
What materials do I need to make the Mind Reading Trick?
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