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robin
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icon Re: Maths Games (0)  
lets make the 24 game more interesting then:

24 game vol 2

use any 4 numbers from 1 to 9
use every math calculation (+,-,*,/,^,root,log and !)
with root and log use only a base with one of the 4 numbers
and get to 24


the 100 game (1,2,3,4,5,6,7,8,9 = 100)
make every number from 1 to 100 using all numbers once
(I'm gonna try this game with only + - * /)
(I'll see how far I get)

both games are big, but if you like it's fun
first game: 495 solutions
second game: 100 solutions

have fun! :thumbsup

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[Last edited by robin at 02-11-2008 11:15 PM]
02-11-2008 at 10:52 AM
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Dolan42
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icon Re: Maths Games (0)  
quote:
Nuntar wrote:
quote:
robin wrote:
Click here to view the secret text


Click here to view the secret text


Click here to view the secret text


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02-11-2008 at 05:36 PM
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robin
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quote:
Nuntar wrote:

Your 100 game:
Click here to view the secret text



That's what I also figured out today (at work O:- )

What I was thinking of: what is the first number you can not make with 1,2,3,4,5,6,7,8,9 and /,*,-,+

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02-11-2008 at 10:10 PM
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Jutt
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That is actually an extremely difficult problem, which probably cannot be solved without a computer program.
However, the largest possible number that you can make is much easier to find.

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02-11-2008 at 11:10 PM
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robin
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icon Re: Maths Games (0)  
yep
Click here to view the secret text

and if you have to try every number ...

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[Last edited by robin at 02-11-2008 11:14 PM]
02-11-2008 at 11:13 PM
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TripleM
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icon Re: Maths Games (0)  
quote:
robin wrote:
yep
Click here to view the secret text




Click here to view the secret text


The smallest unmakeable number sounds like a programming challenge to me :)
02-12-2008 at 12:00 AM
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Sillyman
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icon Re: Maths Games (0)  
quote:
TripleM wrote:
quote:
robin wrote:
yep
Click here to view the secret text




Click here to view the secret text


The smallest unmakeable number sounds like a programming challenge to me :)


Solved. It's Negative Infinity.

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[Last edited by Sillyman at 02-12-2008 04:24 AM]
02-12-2008 at 04:24 AM
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robin
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icon Re: Maths Games (0)  
quote:
TripleM wrote:
quote:
robin wrote:
yep
Click here to view the secret text




Click here to view the secret text


The smallest unmakeable number sounds like a programming challenge to me :)


D'oh! I was searching for something like that :(

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02-12-2008 at 01:59 PM
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robin
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New ones!!!

1) use 8 eight times and become 1000

2)a 3 digit number times 7 gives 3 thousand and that same number
(... x 7 = 3...)

3) use the numbers 1,2,3,4,5,6,7,8,9 once.
make a triagle wich each side has 4 numbers (3 corners + 3 times 2 numbers between the corners)
now each side (4 numbers) must be 20 (sum)
forgot the 9 :blush

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[Last edited by robin at 02-14-2008 04:39 PM]
02-14-2008 at 03:09 PM
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krammer
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icon Re: Maths Games (+1)  
Number 1:
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Number 2:
Click here to view the secret text

For number 3, do you mean 2 numbers on a side and one per corner? In that case you need 9 numbers, not 8...



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02-14-2008 at 04:05 PM
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robin
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fixed


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02-14-2008 at 04:39 PM
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Doom
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Another one for number 1 that I just got with a friend.

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02-14-2008 at 04:43 PM
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coppro
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#3:
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02-14-2008 at 05:21 PM
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robin
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I've got some new challenges:
use only + - * /

make 132 with:
* 1,2,3,4,5
* 2,3,4,5,6
* 3,4,5,6,7
* 4,5,6,7,8
* 5,6,7,8,9

make 312 with:
* 1,2,3,4,5,6
* 2,3,4,5,6,7
* 3,4,5,6,7,8
* 4,5,6,7,8,9

They are all possible

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05-07-2008 at 07:51 PM
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stigant
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132 = 2 * 5 + 1 * 3 * 4 (assuming working left to right like the last time or (2*5+1)*3*4 with correct parenthesization)



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05-07-2008 at 09:37 PM
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robin
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quote:
stigant wrote:
132 = 2 * 5 + 1 * 3 * 4 (assuming working left to right like the last time or (2*5+1)*3*4 with correct parenthesization)




Yep, like the "28" game

There some challenging ones!!! (if you like it ofcourse)

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05-07-2008 at 10:20 PM
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eb0ny
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icon Re: Maths Games (0)  
Here are the solutions for the first one:
Click here to view the secret text
Operations are from left to right, just like in stigant's example. Plus, I took the liberty of skipping an operation.

Obviously this whole list is computer generated. I could post the source of my program as well as *all* the answers, but I do not want spoil the game for others. And yes, I understand this is cheating, so there's no need to remind me.

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05-11-2008 at 01:44 PM
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TripleM
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quote:
Nuntar wrote:
What is the largest number you can make using 1, 2, 3, 4, 5, 6, 7, 8, 9 once each and the four basic arithmetic operations? TripleM's solution of 544320 is not correct. Can you do better?


Well, you can obviously do better if you tweak the rules to allow the concatenation operator ;) Is that what you were referring to? I'd like to see a better answer that uses each digit by itself..
11-25-2008 at 10:07 AM
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robin
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TripleM wrote:
quote:
Nuntar wrote:
What is the largest number you can make using 1, 2, 3, 4, 5, 6, 7, 8, 9 once each and the four basic arithmetic operations? TripleM's solution of 544320 is not correct. Can you do better?


Well, you can obviously do better if you tweak the rules to allow the concatenation operator ;) Is that what you were referring to? I'd like to see a better answer that uses each digit by itself..


That's true, it's not allowed to put 2 numbers next to each other, to make a bigger number. (if you need the number 25, you can't put 2 and 5 together, but for example do: (2+3)*5=25)

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11-26-2008 at 09:52 AM
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TripleM
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Well, I can confirm that my answer was indeed the highest you can get, so I'm not quite sure what Nuntar was talking about.
11-28-2008 at 09:36 PM
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robin
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TripleM wrote:
Well, I can confirm that my answer was indeed the highest you can get, so I'm not quite sure what Nuntar was talking about.


"Neather" am I

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11-29-2008 at 03:37 PM
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