deponti (deponti) wrote,
deponti
deponti

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Took me a while to find out how this works!

I took a little while...well, about 8 tries...to find out how this works. Pretty simple when you think of it!


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



Great fun while it lasts, though! Try it on children, especially, and hear the incredulous "HOW....?"



For any two-digit no., the number minus the sum of its digits is always a multiple of 9. So they just assign a symbol to all the multiples of 9 below 90 (it doesn't work after that)...and that's what you will see. Just to prevent you from spotting it, they assign a different symbol to the multiples each time you try it!

So next time you try it, look at the symbol assigned to all the multiples of 9 on the chart!



Neatly done, and very well packaged!
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