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what is the ratio or prime numbers to composite numbers in this list/10,11,2,13,14,15,16,1,7,18,19,20,21

Q: What is the ratio of prime numbers to composite numbers in this list 101112131415161718192021?

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Prime numbers are: 2 3 5 7 Composite numbers are: 4 6 8 9 10 So the ratio is: 4 to 5

4/4 = 1

It is a ratio of 5:13

2:3

The numbers, when converted to integers are co-prime. So there is no simplification. The ratio is 1683 : 1978 : 2273.

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The ratio of composite numbers 6,3,4,12,18 and 17 to prime numbers would be 9,15,21 and 25. This is taught in math.

The ratio of the number of one-digit prime numbers to the number of one-digit composite numbers is one to one. The one-digit prime numbers are 2, 3, 5, and 7. The one-digit composite numbers are 4, 6, 8, and 9. Therefor, the ratio is 4:4, which simplifies to 1:1.

Prime numbers are: 2 3 5 7 Composite numbers are: 4 6 8 9 10 So the ratio is: 4 to 5

There are four of each.

4/4 = 1

It is a ratio of 5:13

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

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

2:3

A fraction, which is expressed as a ratio of two integers which are both prime cannot be simplified. Otherwise, it may be possible to simplify the fraction if the two share a common factor. Simplified fractions are often easier to work with because they involve smaller numbers.Incidentally, this works with all fractions, not just math fractions!

It is 9419:7209 and, since the two numbers are co-prime, the ratio cannot be simplified.

When either of the numbers cannot be divided by each other or they are both prime numbers.