# did you know

Posers and Puzzles 14 Jan '05 03:41
1. 14 Jan '05 03:41
did you know that

111111111 X 111111111 = 12345678987654320

i thought i was kinda interesting.

PS i not sure if it belongs here but it didnt seem like it should go in the general fourm so i put it here
2. BigDoggProblem
14 Jan '05 05:37
did you know that

111111111 X 111111111 = 12345678987654320

i thought i was kinda interesting.

PS i not sure if it belongs here but it didnt seem like it should go in the general fourm so i put it here
It's a pretty straightforward calculation. If you think of multiplying by hand, you'll end up adding stacks of ones. Each stack will have progressively more ones until the center, which has 9 (the number of ones in your two original numbers) and so you'll see that pattern.
3. Palynka
Upward Spiral
14 Jan '05 15:01
did you know that

111111111 X 111111111 = 12345678987654320

i thought i was kinda interesting.

PS i not sure if it belongs here but it didnt seem like it should go in the general fourm so i put it here
You've made a typo, probably, as it should be 12345678987654321.
4. 14 Jan '05 20:58
Originally posted by Palynka
You've made a typo, probably, as it should be 12345678987654321.
nope, thats the way it came out on the calculator.
5. neight
Cheese log/Beef log
14 Jan '05 21:491 edit
nope, thats the way it came out on the calculator.
Then your calculator's defective. You need prime factors of 5 and 2 for a non-trivial number to end in 0, and 111,111,111 does not have either factor. The correct product is indeed 12345678987654321
6. BigDoggProblem
15 Jan '05 02:52
nope, thats the way it came out on the calculator.
I wouldn't rush to call the calculator defective, but it certainly may not be precise enough to display such a large number correctly.

My Microsoft Excel gives 12345678987654300 as the answer. The last two digits are suspect when the question was 111111111 * 111111111.

The ancient art of handwritten math (!) would quickly show you that your calculator is not telling the full story:

111111111
x 111111111
-------------
111111111
1111111110 ... STOP

Every line after this will have at least one placeholder zero, so the least significant digit will remain 1!
7. TheMaster37
Kupikupopo!
15 Jan '05 13:45
*cough* something ending in a 1 multiplied with something ending in a 1 ends in a 1. It's as simple as that 🙂
8. The Plumber
Leak-Proof
18 Jan '05 00:54
Originally posted by TheMaster37
*cough* something ending in a 1 multiplied with something ending in a 1 ends in a 1. It's as simple as that 🙂
I agree with you, but apparently Bill Gates disagrees, as Excel does give the answer of: 12345678987654300. I was tuaght in school that any number ending 1 times any number ending in 1 gave a product ending in 1. But Bill Gates must be right - he couldn't possibly have gotten so stinking rich by being wrong... ..could he? 😉
9. TheMaster37
Kupikupopo!
18 Jan '05 12:05
Originally posted by The Plumber
he couldn't possibly have gotten so stinking rich by being wrong... ..could he?
Of course he can! 😀
10. The Plumber
Leak-Proof
18 Jan '05 19:20
Originally posted by TheMaster37
Of course he can! 😀
That must explain why I'm not rich....🙁...😲
11. 30 Jan '05 17:35
hey master37, where did you get a picture of a moogle from?????? its cool and i want one.😀😀😀😀😀😀😀😀
12. 02 Feb '05 13:06
Originally posted by red king richie128
hey master37, where did you get a picture of a moogle from?????? its cool and i want one.😀😀😀😀😀😀😀😀
right click on the picture and display properties..........