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I have tried to understand this but need some help. Please explain how you got your answer and please try not to use 6n-1 and 6n+2 because I don'get it unless you can use the number that is given in there somewhere.

Find one pair of twin primes between 85 and 105.

2007-01-12 02:31:55 · 4 answers · asked by Lana 3 in Education & Reference Homework Help

4 answers

A twin prime is a prime number that differs from another prime number by two. Except for the pair (2, 3), this is the smallest possible difference between two primes. Some examples of twin prime pairs are 5 and 7, 11 and 13, and 821 and 823. [Wikipedia]. The distance between 85 and 105 is small, so you can try end err: First, list all the primes: 89 97 101 103. Then check: Only 101 and 103 differ by 2. These are the twin numbers you are looking for.

2007-01-12 02:41:41 · answer #1 · answered by supersonic332003 7 · 1 0

Twin prime numbers are those prime numbers whose difference is 2. for eg:5 and 7. when u substract 5 from 7 u get two. Between 85 and 105 the prime numbers are---89,97,101,103. Thus the only two prime numbers between 85 and 105 that gives u two when u substract them are 101 and 103. If u substract 89 from 97 u get 8i.e.97-89=8 thus they are not twin prime numbers

2007-01-12 02:51:24 · answer #2 · answered by Anonymous · 0 0

Twin primes are prime numbers with a difference of 2 between them. Prime numbers are numbers which have only 2 factors- 1 and the number itself.
The prime numbers between are:89,97,101 and 103.
from this it's obvious the twin primes are 101 and 103.
The basic thing is just list out the primes for small ranges and for large ranges get pro help.

2007-01-12 02:46:41 · answer #3 · answered by Neo 2 · 0 0

Here are the prime numbers between 85 and 105

89
97
101
103

I really dont know what you mean by twin prime numbers but I think that you may be referring to 101 and 103. They are as close as you can get 2 prime numbers to be and I guess that would be considered twins

2007-01-12 02:42:48 · answer #4 · answered by Glenn T 3 · 0 0

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