Magic thingy.

[1-9-7-7]

http://www.learnenglish.org.uk/games/magic-gopher-central.swf


It's pretty cool but I figured out how it works pretty easily.
Try it.

 

[PhoenixFire]

Yeah seen this sort of thing before, very simple to make actually. I'm sure Mr.Pickup can explain.

 

[Perm]

Those kind of things never fail to amaze me, even though I know it isn't really magic.

 

[Adamc]

Edit: oh, spoiler.

Pretty simple, the answer is always a multiple of nine, and every multiple of nine (within the possible range) has the same symbol.

 

[1-9-7-7]

I'd explain but I just wanna see if other people can get it.

 

[1-9-7-7]

Edit: oh, spoiler.

Pretty simple, the answer is always a multiple of nine, and every multiple of nine has the same symbol.

Ding ding ding.

 

[Neil Pickup]

...but why is every answer a multiple of 9? There's the real maths behind it...

 

[1-9-7-7]

Your number = 10a + b, where a is the digit in the tens place and b is the digit in the ones place.
final number =10a+b-(a+b)=9a.
Your number will always be nines times the number originally in the tens place.

 

[headhunter]

Cool stuff.

 

[1-9-7-7]

83 Doesn't work for it.

Yes it does.
8 + 3 = 11
83 - 11 = 72

72 being a multiple of 9

 

[andmark]

Yes it does.
8 + 3 = 11
83 - 11 = 72

72 being a multiple of 9

Sorry a mistake by me.

 

[1-9-7-7]

Sorry a mistake by me.

S'grand.
I've seen other people make more idiotic mistakes with this on other forums.

 

[cover drive man]

Not as good when you find out how its done.

 

[1-9-7-7]

Not as good when you find out how its done.

Seems class at first though.

 

[cover drive man]

Seems class at first though.

Yeah definately.

 

[Josh]

Meh. I always hate those things. I wanna beat them, dammit lol