# math

posted by .

Two consecutive odd primes, such as 11 and 13, are called a pair of "twin primes" how many pairs of twin primes are there between 15 and 45?

F-2
G-3
H-4
J-5
K-7

• math -

Make a list of odd consecutive pairs. It cannot include 15, 21, 25, 27, 33, 35, 39, or 45.
17 - 19
29 - 31
41 - 43
A total of three

I can't think of any others. Can you?

## Similar Questions

1. ### mathematics

The larger number of the fourth set of twin primes?

URGENT HELP!Squares into Primes Some primes can be expressed as the sum of two squares, as in 13=2^2+3^2; some can't:7=/=a^2+b^2. Other primes can be c^2+2e^2 like 11=3^2+2*1^2; still others are f^2+3 g^2, like 31=2^2+ 3* 3^2. Find …
3. ### math

1. Carlos works 8.25 h and receives \$102.30 pay. What will he receive at the same rate if he works if he works 14 h?
4. ### Maths

Andrew arranged the number 1, 2, 3, ...11, 12 into six pairs so that the sum ofany two numbers in a pair is prime and no two of these primes are equal. find the primes and the pairs
5. ### math

Two consecutive odd primes, such as 11 and 13, are called a pair of "twin patterns
6. ### math

what are twin primes?
7. ### math

The Twin Prime Conjecture, which has not been proven, argues that there are infinitely many pairs of primes of the form n and n+2. Such a pair is called a prime pair. Some examples of prime pairs are 5 and 7, 17 and 19, and 29 and …
8. ### math

twin primes have one composite number between them(e.g.5,7).write one pair of twin primes between number 20 and 40
9. ### math

three consecutive primes are summed. when the sum is squared, the result is 72,361. what is the largest of the three primes?
10. ### Discrete Math

Let n be positive integer greater than 1. We call n prime if the only positive integers that (exactly) divide n are 1 and n itself. For example, the first seven primes are 2, 3, 5, 7, 11, 13 and 17. (We should learn more about primes …

More Similar Questions