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The prime numbers between 20 and 40 are 23, 29, 31 and 37 that is 4 out of 20 or 1 to 5

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What is the ratio of prime numbers to composite numbers in this list 2 3 4 5 6 7 8 9 10?

Number of primes = 4 Number of composites = 5 Ratio of primes to composites = 4 : 5


What is the ratio of number of primes and composites between 20 and 30?

It is 2:7


What is the ratio of number of primes and number of composites between 20 and 40?

The prime numbers between 20 and 40 are 23, 29, 31 and 37 that is 4 out of 20 or 1 to 5


Are there more primes or composites?

In any large range of numbers, more so the higher and larger the range is, there will be more composites than primes. It is far more likely that a given number will be divisible by some number less than the number itself, the higher you go.


What is the ratio of the number of primes and the number of composites between and 40?

4 to 15 exclusive 4 to 17 inclusive


What is the ratio of the number of primes and the number of composites between the number of 40?

4 to 15 exclusive 4 to 17 inclusive


What numbers 1-100 are composite and prime?

primes are 1,2,3,5,7,11,13,17,19,23,29,31,41,43,47,53,59,61,67,71,73,79,83,89,91. all others are composites.


What is the product of the primes?

The products of the primes are the composites.


What is the ratio of the number of primes and the number of composites between 20 and 40?

4 to 15 exclusive 4 to 17 inclusive


List all of each number then identify each number prime or composite?

There are infinitely many numbers, and these comprise infinitely many primes and composites. It is not possible to list them all.


How many composite numbers less than 1500?

Of the 1499 numbers less than 1500, number 1 is neither prime nor composite, 239 are primes, and the remaining 1259 are composites.


Do twin primes have one composite number between them?

No, twin primes are pairs of prime numbers that have only one number between them which is a composite number. For example, (3, 5) and (11, 13) are twin prime pairs with the composite number 4 and 12 respectively between them.