Best Answer

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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Q: A prime from 27 15 21 23?

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Related questions

17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..

They are all prime numbers except for 15 21 25 and 27 which are composite numbers

23

It is 23

9, 15, 21, 25 and 27 aren't .. because they have more than two divisors.

21, 23, 27 and 29

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

YES

No, odd numbers such as 9, 15, 21, and 27 are not prime.

10 and 21

23 is the prime number.

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

3 is a multiple of 15, 21, and 27.

27

Range = Maximum minus Minimum= 27 - 10 = 17

23 and 27 are prime numbers whereas 36 and 39 are composite numbers.

17 19 21 23 25 27 29

The LCM of 15, 21 and 27 is 945.

15 21 33 35 42 45 75 77

27

23 is prime. The rest aren't.

29 is a prime. 9, 21, and 27 are composites because they are multiples of 3.

23+23 = 4625+21? nope - neither is prime27+19? nope - 27 isn't prime29+17 = 46 and both are prime numbers31+15? No, because 15 isn't prime.33+13? No, because 33 is not prime.35+11? No, because 35 is not prime.37+9? No, because 9 is not prime.39+7? No, because 39 is not prime.41+5 = 46 Yes, because both are prime!43+3 = 46 and both are prime numbers.

41, 29 and 23 are all prime numbers. 27, however, isn't as it is divisible by three.

7 11 17 13 15 21 23 27 and so forth