The disregarded 8

[niebieskieucho]

The 8 is disregarded in the following multiplicands:

 

 

12345679 x 9 = 111,111,111

 

12345679 x 18 = 222,222,222

 

12345679 x 27 = 333,333,333

 

12345679 x 36 = 444,444,444

 

12345679 x 45 = 555,555,555

 

12345679 x 54 = 666,666,666

 

12345679 x 63 = 777,777,777

 

12345679 x 72 = 888,888,888

 

12345679 x 81 = 999,999,999

 

 

 

 

And that is why the 8 revenged itself on the 1 ignoring it in a step-like product:

 

 

 

 

12345679 x 8 = 98,765,432

 

 

 

 

By the way, in this way you can check if your calculator calculates properly

 

 

 

 

 

[sysD]

very nice.

[Shadow]

Just out of curiosity, I tried out 987654321/123456789. I lol'd.

[Fuzzwood]

I lol'd at you because of your puny 8-digit display.

[Shadow]

I'm well aware that it's not exactly eight; a single look at the parity of the dividend proves the impossibility of the quotient ever being an even number. But that fact that it's an almost integer is in itself lolworthy; the fact that it's almost eight is roflworthy, in this context.

[Xittenn]

\o_ I'm Lolling

[niebieskieucho]

I'm well aware that it's not exactly eight; a single look at the parity of the dividend proves the impossibility of the quotient ever being an even number. But that fact that it's an almost integer is in itself lolworthy; the fact that it's almost eight is roflworthy, in this context.

 

Well done

I've read somewhere (Internet) that:

12345679 x 999,999,999 = 12345678987654321. This time only the nine turns out to be a looser. It appears only ones in the product.

 

--

Ihad a dream that I was on the Moon, but I woke up during new moon andcouldn't ascertain where in fact I was

Edited April 12, 2011 by niebieskieucho

[Fuzzwood]

That person horribly failed, the answer = 123,456,788,876,543,211

[niebieskieucho]

That person horribly failed, the answer = 123,456,788,876,543,211

 

 

Nope. I've checked it twice.

 

 

 

 

[Shadow]

It's 1234567 9 x 999,999,999, not 123456789 x 999,999,999 Fuzzwood.

Edited April 17, 2011 by Shadow

[keelanz]

<3 numbering patterns

[baric]

adding x1 to the end gives it a nice symmetry!

 

 

12345679 x 8 = 98765432 x 1

 

 

Also, I'm not a big believer in mathematical flukes, so I tested this further...

 

 

In Base 6, did you know that 1235 x 4 = 5432 x 1

 

So apparently it's purely an artifact of digital notation. Maybe that was already obvious to everyone, but I find it interesting.

Edited May 29, 2011 by baric