Suppose 2/N , 3/N, and 5/N are three fractions in lowest terms. What are all the possible composite whole number values for N between 20 and 80?
30 Comments
ajc
11/3/2011 07:53:08 am
Try working with your prime and composite chart from unit 1. Also, use divisibility rules.
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arl
11/5/2011 06:52:07 am
My hint is to start by finding which numbers do not work because the fractions will not be in lowest terms.
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ta
1/2/2012 05:31:30 am
what do you mean?
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KW
11/6/2011 09:26:30 am
I'm trying to find the numbers that the numerator is not divisible by
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su
11/8/2011 06:47:55 am
I think what you should do is count by the highest number at the top of the fraction.(hint)
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jet
11/9/2011 04:40:42 am
can i have some help???
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jet
11/9/2011 04:46:16 am
all u have to do is make the fraction into largest form
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tj
11/9/2011 09:27:03 am
You can immediatly rule out any number that is divisible by 2,3, or 5, then use guess and check for the rest.
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CM
11/10/2011 10:03:37 am
Start by thinking of prime numbers between 20 and 80.
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VP
11/11/2011 10:50:39 am
Think of numbers that are not divisible by 2,3 and 5(that are composite).
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ONB
11/12/2011 10:25:15 pm
If you didn't bring home your math journal, you can always make your own prime and composite chart.
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Mrs. Parker
11/14/2011 09:03:38 am
There are some great hints here! Don't forget you can start posting the answer this next Monday!
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TL
11/16/2011 05:00:27 am
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hs
11/16/2011 09:32:44 am
its easy just look at your # cart like everybody says
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11/16/2011 09:33:35 am
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11/17/2011 09:01:22 am
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AG
11/17/2011 10:26:02 am
Don't forget to cross out any prime numbers! It will reduce the possibilities a lot.
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bls
11/18/2011 10:07:19 pm
im so confuesed
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ejm
11/29/2011 07:03:15 am
I think if you find what #'s don't work like arl said it is easy.
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ejm
11/29/2011 07:10:28 am
I got it. Try what VP said about ruling out the numbers that are divisible by 2,3, and 5.
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oa
11/29/2011 09:43:31 am
i got it. Try listing numbers.
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MG
11/30/2011 09:58:05 am
I've come up with 3 possible numbers. Does anyone else agree?
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SI
12/1/2011 07:46:31 am
I havn't got it yet, but I think I know how to figure it out!!! (:
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AH
12/1/2011 10:49:22 am
It helps a lot if you list the numbers 20 through 80 and cross out the ones that are divisible by 2,3,and 5, since the fractions are in simplest form.
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pb
12/11/2011 06:41:11 am
Sorry I'm late, but I got the answer.
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TA
1/2/2012 05:29:44 am
otherwise , what is it?
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tsa
1/2/2012 05:27:35 am
HOW DO YOU SOLVE THIS???????
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ta
1/2/2012 05:40:59 am
okay,never mind. I got the answer.
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ta
1/2/2012 05:41:14 am
what did you get?
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TSA
1/18/2012 06:02:30 am
Was the new Problem of the Month published yet?
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