WHY is it always 1089? anyone can explain?

Well, what I figured out is this:
when you subtract the number you chose with its reverse, the middle number will stay constant, lets solve 842-248, you have to take 1 from the second no. so you can subtract 2-8 so it will be 12-8=4 and then the second no. 4 will be 3 which which will bcome 13-4=9, the answer will always be 9. So 842-248=594, notice also that the 1st no. 5, if you add it with the 3rd no. 4, you will also get a 9. why is this necessary to tell you? bec. of this: It's always reversing the 1st and the 3rd no. right? so adding the 1st with 1st will have the same result as adding with 3rd and 3rd (like 594+495 (5+4=9 and 4+5=9)
That's why you get 1089 everytime, bec. the 4th no. 9 is a result of the 4+5. The 3rd no.8 is a result of the constant 9 (9+9=18 and you only put the 8 and move the 1 to the next number))you get 10 (1089) from 4+5 bec. when you add the 9+9 it will result in 18, you'll put the 8 down and move the 1 to the next add (4+5) and you'll have to add a 1 with them so you get 10
and there you have it, you will always get 10 8 9

Ofcourse under two conditions, which were stated above

I don’t know if anyone will understand what I wrote,I think it is poorly written lol, but I don't care, I'm glad I figured it out.

We'll I just learned something new today:)

You do realize that last night MANY people partied and are hung over today. Or are partying today and will be hung over tomorrow..anyway that question made my head hurt and although I drank last night..my brain is clear. I imagine other's brains are near the breaking point! But all the same..I second laceset.

What about 111, 222, 333, ect? :P

No, I can't explain it. I'm a social scientist, not a mathematician. I don't care about numbers except where my checkbook is concerned.

Hi bublina
You are right.
Take any 3-digit number in which the first and last digits differ by 2 or more. Reverse the number, and subtract the smaller of the two numbers from the larger (e.g. 782-287=495). Then reverse the result and add (thus 495+594=1089). The remarkable thing with this is: the result is always 1089, no matter which 3-figure number you start with.

Mathematics is an art creating poetry with numbers as if with letters and words.
:)