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#1 2010-05-22 03:09:06
- MrsHappyPants
- Member
- Registered: 2010-05-22
- Posts: 2
Products of numbers
I know about products - 3X5=15 therefore the product numbers of 15 are 3 and 5, but Im really stuck as I have to find out the product numbers of 12 and one of them is 2 1/4 , so how would you work out what the other one is? 
Please Help me 
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#2 2010-05-22 03:43:25
- ZHero
- Real Member
- Registered: 2008-06-08
- Posts: 1,889
Re: Products of numbers
You can find the other number by dividing 12 by 2 1/4.
2 1/4 = 2+(1/4) = 9/4
Now divide 12 by 9/4
12 ÷ 9/4 = 12 × 4/9 = 16/3 = 5 1/3
The other number is "5 1/3".
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Last edited by ZHero (2010-05-22 03:45:35)
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#3 2010-05-22 03:58:31
- MrsHappyPants
- Member
- Registered: 2010-05-22
- Posts: 2
Re: Products of numbers
Thankyou
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#4 2010-09-08 10:12:32
- tycoal
- Member
- Registered: 2010-09-08
- Posts: 1
Re: Products of numbers
I need help using the digits1,2,3,4,and 5 to form a two-digit and three-digit number so that their product is the least product possible, using each digit only once. thank you!
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#5 2010-09-08 11:47:05
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Products of numbers
Hi tycoal
Welcome to the forum.
If you don't require that the product also is from the set {1,2,3,4,5} then
13 * 245 = 3185
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#6 2010-09-08 18:00:04
- soroban
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- Registered: 2007-03-09
- Posts: 452
Re: Products of numbers
. .
. . . . .
.
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#7 2010-09-09 03:58:04
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Products of numbers
Hi all;
Nice latexing, soroban!
Tycoal;
That is the point. The 2 digits are the key! There are only 10 of them, 5 choose 2. Easy to try all of them. You use anything you can when solving a problem! It is all fair!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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