If you are out of ideas for how to push your kid into learning maths, maybe this Magic Chrystal Ball game will help. It is simple and effective, while being fun. Requires Macromedia Flash though.
Magic chrystal ball
Posted in All on October 22nd, 2004 · 3 Comments
3 responses so far ↓
1 Vladimir Ivaschenko // Oct 22, 2004 at 3:18 pm
It took me some time to figure this one out. :)
2 alexei // Oct 24, 2004 at 4:06 am
As leonid correctly guessed and I expanded his guess,
(A*10+B)-(A+B) = 10A+B-A-B = 9A
which always gives out numbers divisible by 9.
How about games with integrals and derivatives next time?
3 Leonid Mamchenkov // Oct 24, 2004 at 4:16 am
[2] Yeah, well… the formula was easy. But the real nice touch to the whole thing was how they reloaded the table with symbols and how they used a random symbol for 0.
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