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theres only one even Prime number, thats 2
prime numbers can only be divided by themselves, and 1
21, divisible by 3 or 7, so no
28 even number other than 2, so no
15, divisible by 3 or 5, so no
17 divisible only by itself and 1, so yes
28, even number, other than 2, so no
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What are the prime numbers between 10 and 21?
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
How many prime numbers are between 10 and 21?
Four. The prime numbers between 10 and 21 are 11, 13, 17, and 19.
Is 15 17 19 21 23 25 27 29 and 31 prime or composite?
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
Is 3 13 17 21 23 25 a prime number?
3, 13, 17, 23 are prime numbers. The others are not.
Why are 9-15-21 not Prime numbers?
ANSWER: 9, 15, 21 are not prime numbers because these numbers have factors other than 1 and themselves. Therefore, 9, 15, 21 are composite numbersFactors of 9 other 1 and itself (9) : 3Factors of 15 other 1 and itself (15): 3, 5Factors of 21 other 1 and itself (21): 3, 7
Is 13 15 17 19 21 23 25 27 29 prime numbers?
They are all prime numbers except for 15 21 25 and 27 which are composite numbers
Are 17 and 21 prime numbers?
17 is a prime number, but 21 is not (21 = 3 * 7).
What are the prime numbers between 10 and 21?
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
Are 17 and 21 relatively prime numbers?
Yes.
How many prime numbers are between 10 and 21?
Four. The prime numbers between 10 and 21 are 11, 13, 17, and 19.
What are all the prime numbers from 1-21?
The prime numbers from 1 to 21 are 2, 3, 5, 7, 11, 13, 17, and 19.
What odd number between 11 and 21 is the product of two prime numbers?
13 is prime so it is not the number. 15 is the product of 3 and 5, two prime numbers, so it fits the conditions. 17 is prime so it is not the number. 19 is prime so it is not the number. 15 is the only odd number between 11 and 21 that fits the conditions. However, if 21 is included in the range, it also is the product of two prime numbers: 3 x 7.
What are the prime numbers between 2-21?
The prime numbers between 2 and 21 are: 2, 3, 5, 7, 11, 13, 17 and 19
Is 15 17 19 21 23 25 27 29 and 31 prime or composite?
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
Is 9 11 13 15 17 19 21 23 25 27 29 prime numbers?
9, 15, 21, 25 and 27 aren't .. because they have more than two divisors.
Is 3 13 17 21 23 25 a prime number?
3, 13, 17, 23 are prime numbers. The others are not.
Why are 9-15-21 not Prime numbers?
ANSWER: 9, 15, 21 are not prime numbers because these numbers have factors other than 1 and themselves. Therefore, 9, 15, 21 are composite numbersFactors of 9 other 1 and itself (9) : 3Factors of 15 other 1 and itself (15): 3, 5Factors of 21 other 1 and itself (21): 3, 7
