Write down a three-digit number,
where the first and and last digits are different.

Reverse the order of the digits.

Subtract the smaller number from the larger.

Multiply the result by any number that you wish (Yes, any number!).

Now strike out any one of the digits in the answer (except a zero).

Enter the digits that you have left (in ANY order but with no spaces):

 

Click here to run again

Click here to see why it works