# Category Archives: Math Magic

Math magic, math magician, mathemagic tricks. Math-based magic

### Learn Magic: Lost at Sea

March is Pi Day.  Here’s a fun math trick to amaze your friends! Ready to learn to perform this?  Remember:  Please don’t reveal the secret! Download your Lost at Sea Sheet.  Two versions are enclosed:  one with smaller numbers, and a challenge version with larger ones.  This trick uses a magic square.  Although there are lots of varied numbers, and even different row and

### Stamp Puzzler: You Won’t Believe This One!

I have a problem. I have 4 rows of 3 stamps, as you see in the picture.  However, my stamp album only has room for 3 rows of 4 stamps.  Life is challenging at times, isn’t it!  Can you make 1 continuous tear along the perforations so theses stamps will fit in the album?

### Product = Sum? You Must be Kidding!

What is the only 2-digit number where the product of its digits equals the sum of its digits? E.g. could it be 37?  3×7=21.  3+7=10.  These don’t match, so it’s not 37.  What is it then?

### Learn Magic: Lightning Add 10 Consecutive Numbers!

Back in school, you’ll drop some jaws with this one!

### What is the largest number that can be made with 2 digits?

This one is trickier than you think!

### Can You Make Change for \$1–in 10 Different Ways?

Can you make 1 coin equal \$1? Can you make 2 coins equal \$1? 3 coins?  4?  Etc. up to 10 coins equaling \$1?

### Amazing Amoebas

Amoebas are small organisms that reproduce rapidly.  They double every minute.  In 1 hour they filled half a bottle.  How long will it take to fill the whole bottle?

### Learn Magic: Beware the Bermuda Triangle!

Vanish a raft in this map of the Bermuda Triangle!

### Sept is the 9th Month. Can You Make 100 with Four 9’s?

You can combine the 9’s however you wish, and use whatever arithmetic symbols you’d like–+, -, x, /.  Any ideas?

### Can You Arrange Five 6’s so They Equal 19?

You can put the 6’s together however you’d like.  And you can use whatever arithmetic symbols you want:  +, -, x, or /.  Tough one, eh?