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They have more than two factors.

Q: Why is the numbers 6 12 18 24 30 36 42 and 48 will never be prime numbers?

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No, neither 12 nor 18 are prime numbers. A prime number is a number greater than 1 that can only be divided by 1 and itself. Both 12 and 18 can be divided by numbers other than 1 and themselves, so they are not prime.

5 and 37 are prime. 12 and 18 are composite.

No, 12 and 18 are not coprime. Their common factors are 2, 3, and 6.

12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers

2, 3, 5, 7, 11, 13, 17, 19 ARE prime numbers! 1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20 are NOT prime numbers!

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No, neither 12 nor 18 are prime numbers. A prime number is a number greater than 1 that can only be divided by 1 and itself. Both 12 and 18 can be divided by numbers other than 1 and themselves, so they are not prime.

5 and 37 are prime. 12 and 18 are composite.

No, 12 and 18 are not coprime. Their common factors are 2, 3, and 6.

To do this, you need to split the numbers into their prime factors: 18 = 2x3x3 12 = 2x2x3 The next step is to identify any common prime factors between the two numbers. In this case both numbers have a 2 and a 3 as prime factors. Multiply these together, and we get: 2x3 = 6. Therefore the HCF of 18 and 12 is 6.

Co prime numbers are a pair of numbers not having any common factors other tha 1 or -1.

The prime numbers (factors) of 18 are: 2 and 3

There are two pairs of prime numbers that express 18 as the sum of two prime numbers: 7 + 11 = 18 and 5 + 13 = 18.

5 and 41 are prime numbers but 18 is a composite number

The sum of the prime numbers 2, 5, and 11 is 18.

Prime numbers: 1, 2, 3. Not prime numbers: 4, 6, 9. 12, 18, 36

GCF(12, 18, 60) = 6

To have a gcf of 18 they must have one factor of 18 in common and no other factor, ie the second factor of the numbers must be relatively prime. The multiples of 18 between 200 and 300 are: 12 x 18 = 216 13 x 18 = 234 14 x 18 = 252 15 x 18 = 270 16 x 18 = 288 12 is relatively prime to 13 13 is relatively prime to 14, 15 & 16 14 is relatively prime to 15 15 is relatively prime to 16 (Pairs of numbers are being considered, so as 12 is relatively prime to 13, 13 is also relatively prime to 12 and thus is only listed when the numbers increase, ie under 12 and not under 13.) Thus the pairs: 216 & 234 234 & 252 234 & 270 234 & 288 252 & 270 270 & 288 all have a gcf of 18.