Is your number 18?

Magic Math Trick
1. Choose a number, any number!
2. Multiply the number by 100.
3. Subtract the original number from the answer.
4. Add the digits in your answer.
Is your number 18?!

Example: 
5
5 x 100 = 500
500 - 5 = 495
4 + 9 + 5 = 18

Now, let's try a larger number!
1,467
1,467 x 100 = 146,700
146,700 - 1,467 = 145,233
1 + 4 + 5 + 2 + 3 + 3 = 18
It's magic!

Check out Is your number 2? for more mind reading magic! For more math magic activities click here!