Number trick with 1089
The number trick with 1089 has been around for centuries. To impress someone with this trick, he or she will need paper and pencils:
Here is how it goes:
Step #1:
Have the person write down any three digits number with
decreasing digits (432 or 875).
Step #2:
Reverse the number you wrote in step #1.
Step #3:
Subtract the number obtained in step #2 from the number you wrote in step #1
Step #4:
Reverse the number obtained in step #3
Step #5:
Add the numbers found in step #3 and step #4
Example #1:
Step #1:
Have the person write down any three digits number with decreasing digits: 752
Step #2:
Reverse the number you wrote in step #1: 257
Step #3:
Subtract the number obtained in step #2 from the number you wrote in step #1: 752  257 = 495
Step #4:
Reverse the number obtained in step #3: 594
Step #5:
Add the numbers found in step #3 and step #4: 495 + 594 = 1089
Example #2:
Step #1:
Have the person write down any three digits number with decreasing digits: 983
Step #2:
Reverse the number you wrote in step #1: 389
Step #3:
Subtract the number obtained in step #2 from the number you wrote in step #1: 983  389 = 594
Step #4:
Reverse the number obtained in step #3: 495
Step #5:
Add the numbers found in step #3 and step #4: 594 + 495 = 1089
Example #3:
Step #1:
Have the person write down any three digits number with decreasing digits: 210
Step #2:
Reverse the number you wrote in step #1: 012
Step #3:
Subtract the number obtained in step #2 from the number you wrote in step #1: 210  012 = 198
Step #4:
Reverse the number obtained in step #3: 891
Step #5:
Add the numbers found in step #3 and step #4: 198 + 891 = 1089
This number trick with 1089 works with any 3 digits number as long as you choose a number with decreasing digits in step #1
So, it does not matter what number the person choose in step #1, have the person do the math and pretend you are not looking. When you call
the answer as 1089, the person will be shocked! Cool!

May 21, 17 09:19 PM
Sharpen your math skills by grade here with crystal clear lessons
Read More
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.