The 1089 Math Mystery

Added: 2026-05-28

[00:00:00]Pick any three-digit number. I already know how it ends, but the first and last digits must be different. Let us say I pick 732.

[00:00:07]Now, reverse it and subtract the smaller number. Now, reverse the answer and add them. And the answer is always 1089. Try it with your own number. Comment your starting number below. Subscribe for tomorrow's math trick.