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HelicopterOff Topics › Another math prob: 4's puzzle
06-03-2004 12:20 AM  13 years agoPost 1
noname

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Woodinville, WA

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Here's a good one .... did this during college with my gf (now wife). ... Took us about 8 hours to get them all.

Using exactly four 4's and any mathematical operations, try to write equations that have the numbers from 0 to 100 as the answer.

So for example:

0 = 44 - 44
16 = 4 + 4 + 4 + 4
52 = 44 + 4 + 4

... and so on !

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06-03-2004 04:00 AM  13 years agoPost 2
Hercdriver7777

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South Carolina

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I have never been that bored..

Good Flying!!

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06-03-2004 04:25 AM  13 years agoPost 3
Temjin

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Walnut CA, HsinChu Taiwan

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Some number are hard to get...espically the old one



Life is short. Offend as many people as you can. - Tom Leykis

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06-03-2004 05:02 AM  13 years agoPost 4
Chem Geek

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AL

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One is easy, (4x4) / (4x4) =1
But damn, who wants to keep going after that? No thanks

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06-03-2004 06:10 AM  13 years agoPost 5
JCadwell

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Richland WA/ Morro Bay, CA

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44-44=0
44/44=1
4/4+4/4=2
(4+4+4)/4=3
(4/4)^4*4=4
(4*4+4)/4=5
(4!+4-4)/4=6
44/4-4=7
4+4+4-4=8
4+4+4/4=9
(44-4)/4=10

Thanks, John Cadwell

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06-03-2004 06:30 AM  13 years agoPost 6
foo

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Richfield, Minnesota

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lol

Raptor 30 v2 / OS .32 / JR 8103 / GY-401+9253 | Raptor 50 V2 / OS .50 Hyper

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06-03-2004 07:25 AM  13 years agoPost 7
noname

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Woodinville, WA

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(4!-sqrt 4)/.4+sqrt 4 = 57
44/.44 = 100

For the most part, that's as hard as they get. The really difficult ones (without using combination, permutaion, bar, gamma and functions of the sort) are the following: 73, 87, 93!

If you can seriously get those without looking at the answer and without using the above mentioned functions, you're definitely good in math

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06-03-2004 07:54 AM  13 years agoPost 8
Drunk Monk

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Preston, UK

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(4X4X4)+(4+4+4/4)=73
(4X4X4)+(4X4)+(44/4-4)=87
(((4X4)+(4+4))X4)-((4+4+4)/4)=93

Where's the answers?


Stephen

I only open my mouth to change feet.....

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06-03-2004 08:47 AM  13 years agoPost 9
JCadwell

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Richland WA/ Morro Bay, CA

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The square root should be cheating. You should be able to raise something to a power or take the 4th root, but the square root is just raising something to the 1/2 power. So you couldn't do half of the problems.... :

Thanks, John Cadwell

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06-03-2004 08:51 AM  13 years agoPost 10
Drunk Monk

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Preston, UK

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I reckon you should be able to take a power since it just saves having to write 4X4X4X4


Stephen

I only open my mouth to change feet.....

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06-03-2004 08:06 PM  13 years agoPost 11
noname

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Woodinville, WA

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The square root should be cheating
Im not sure about this ... I would say the same as you're implicitly elevating to the power of 0.5.

The rule is you can use any mathematical expression and I don't know if SQRT would qualify as one, or if you'd have to represent it as X ^ (4 / (4 + 4))

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HelicopterOff Topics › Another math prob: 4's puzzle
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