None of them
Chat with our AI personalities
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.
It is 17.
18 is not a prime number so no number can have 18 as a prime factor.
The least common multiple (LCM) of 12 and 18 is 36, which is the smallest number that both 12 and 18 can divide into without leaving a remainder. To find the LCM, you can list the multiples of each number or use prime factorization. Thus, 36 is the number that both 12 and 18 go into.
Prime numbers are only divisible by themselves and 1. 36 can be divided by 2, 3, 4, 6, 12 and 18 and is not a prime number.