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The Magic Cafe Forum Index » » Magical equations » » Calc this #3 Printer Friendly Version
Nir Dahan

Inner circle
Munich, Germany
1391 Posts
Posted: Apr 28, 2004 2:32am    Reply with quote   View Profile of Nir Dahan  

Use 3 "3"s to get to 20 (not restricted to the 4 elementary arithmetic operations)


Adventures in ASIC digital design
pxs

Loyal user
London
284 Posts
Posted: Apr 28, 2004 5:54am    Reply with quote   View Profile of pxs  

(3!!/3!)/3!
Nir Dahan

Inner circle
Munich, Germany
1391 Posts
Posted: Apr 28, 2004 8:34am    Reply with quote   View Profile of Nir Dahan  

You got it!

Adventures in ASIC digital design
Turk

Inner circle
Portland, OR
3373 Posts
Posted: May 12, 2004 4:06am    Reply with quote   View Profile of Turk  

Quote:

On 2004-04-28 05:54, pxs wrote:
(3!!/3!)/3!



PXS,

Would you please be so kind to translate this formula into "English" for we non-math majors? Thanks.

Mike

Magic is a vanishing Art.

This must not be Kansas anymore, Toto.

Eschew obfuscation.
pxs

Loyal user
London
284 Posts
Posted: May 12, 2004 4:54am    Reply with quote   View Profile of pxs  

The '!' symbol (pronounced factorial) means "multiply together all the numbers from 1 to x"

So - 5! is 5x4x3x2x1

So - 3! is 3x2x1 which is 6
and 3!! is 6!
Turk

Inner circle
Portland, OR
3373 Posts
Posted: May 12, 2004 5:09am    Reply with quote   View Profile of Turk  

Thanks, PXS. Whew!! Now I know why I didn't quit my day job to become a mathematician.

Mike

Magic is a vanishing Art.

This must not be Kansas anymore, Toto.

Eschew obfuscation.
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