- Write down a three-digit number whose digits are decreasing.
- Then reverse the digits to create a new number.
- Subtract the reversed number from the original number.
- With the resulting number, add it to the reverse of itself.
The number you will get is 1089!
- Let us take 532 (three digit number in decreasing order).
- Then the reverse is 235.
- Subtract 532-235 to get 297.
- Now add 297 and its reverse 792,
- The resulting answer is 1089!