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27 is composite. 27 = 3 * 3 * 3 = 33
15 is composite. 15 = 3 * 5
21 is composite. 21 = 3 * 7
23 is a Prime number. It is only evenly divisible by itself and one.
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∙ 14y ago
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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
Which is a prime numbers 21 23 25 or 27?
It is 23
Prime numbers between 21 and 30?
21, 23, 27 and 29
What is the prime of numbers 21 22 23 24 25 26 27 28 29 30 and why?
prime of numbers 21 22 23 24 25 26 27 28 29 30 prime numbers are: 23 & 29 because their factors are only 1 and themselves. factors of: 23= 1, 23 29= 1, 29 22, 24, 25, 26, 27, 28 & 30 are not prime numbers because these numbers have other factors aside from 1 and themselves. Example: factors of 22: 1, 2, 11, 22
Which of these is not a prime number 1 3 11 15 17 21 23 27 33 35 37 39 42 45 47 51 61 69 75 77 83?
15 21 33 35 42 45 75 77
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 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
Which one is prime out of 21 23 22 27?
23
Which is a prime numbers 21 23 25 or 27?
It is 23
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.
Prime numbers between 21 and 30?
21, 23, 27 and 29
I need to know which pair of numbers in relatively prime 10 and 21 or 12 and 54 or 15 and 27 or 21 and 38?
hcf(10, 21) = 1 ⇒ 10 & 21 relatively prime hcf(12, 54) = 6 ⇒ 12 & 54 not relatively prime hcf(15, 27) = 3 ⇒ 15 & 27 not relatively prime hcf(21, 38) = 1 ⇒ 21 & 38 relatively prime
Are 3 5 15 21 27 prime numbers?
YES
Which pair of number is relatively prime 10 and 21 12 and 54 15 and 27 21 and 39?
10 and 21
What is the prime of numbers 21 22 23 24 25 26 27 28 29 30 and why?
prime of numbers 21 22 23 24 25 26 27 28 29 30 prime numbers are: 23 & 29 because their factors are only 1 and themselves. factors of: 23= 1, 23 29= 1, 29 22, 24, 25, 26, 27, 28 & 30 are not prime numbers because these numbers have other factors aside from 1 and themselves. Example: factors of 22: 1, 2, 11, 22
What number is prime 23 27 33 or 51?
23 is the prime number.
Which of these is not a prime number 1 3 11 15 17 21 23 27 33 35 37 39 42 45 47 51 61 69 75 77 83?
15 21 33 35 42 45 75 77
