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fraction

 
 
Reply Fri 3 Jun, 2005 12:14 am
Finf the fraction greater then 1/4 and less than 3/10 that has the smallest possible denominator...
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Type: Discussion • Score: 1 • Views: 648 • Replies: 9
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Brandon9000
 
  1  
Reply Fri 3 Jun, 2005 12:58 am
Some multiples of 4 are 8,12,16, 20, 24,28,32,36,40.
Some multiples of 10 are 20,30,40.

Let's try the common denominator 20. 1/4 = 5/20. 3/10 = 6/20. Nothing in between them.

Let's try again. The next common denominator of 4 and 10 up from 20 is 40. 1/4 = 10/40. 3/10 = 12/40.

11/20 is in between them.

Edit: Oops, typo. Should be 11/40.
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markr
 
  1  
Reply Fri 3 Jun, 2005 01:39 am
11/40
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raprap
 
  1  
Reply Fri 3 Jun, 2005 02:25 am
The LCM of 4 and 10 is 20 and 1/4=5/20 and 3/10=6/20, but there is no integer between 5 and 6.
So try 2*20=40.

1/4=10/40 and 3/10=12/40, and 11 is between 10 and 12, so the fraction is 11/40.

Rap
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engineer
 
  1  
Reply Fri 3 Jun, 2005 06:32 am
Another fraction
1/4 = .25
3/10 = .30
No fractions of 2-6 fall into this range, but...

How about 2/7?
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markr
 
  1  
Reply Fri 3 Jun, 2005 09:15 am
Embarrassed
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raprap
 
  1  
Reply Fri 3 Jun, 2005 09:33 am
Embarrassed Rap
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Brandon9000
 
  1  
Reply Fri 3 Jun, 2005 10:10 am
That's odd.
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engineer
 
  1  
Reply Fri 3 Jun, 2005 12:28 pm
Wow!!
Caught Rap, MarkR, and Brandon!! Wow, I guess I can retire now! No more mountains to climb. Laughing
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Brandon9000
 
  1  
Reply Fri 3 Jun, 2005 12:50 pm
Re: Wow!!
engineer wrote:
Caught Rap, MarkR, and Brandon!! Wow, I guess I can retire now! No more mountains to climb. Laughing

The sun was in my eyes.
0 Replies
 
 

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