What is the LCM of 13 and 7?

Answer 1

LCM of 7 and 13

Since 7 and 13 are both prime numbers, or numbers whose only factors are 1 and itself, the LCM can be found by multiplying 7 and 13 together. The answer will be 91.

Though multiplying the numbers together when working with composite numbers MIGHT work, it only works 100% of the time when both numbers are prime. If one or both numbers are composite (have more factors than 1 and itself), multiples should be listed until a common one is found. That number will be the LCM.

The LCM of 7 and 13 is 91.

Answer 2

The numbers do not have a factor in common (they are relatively prime) so the LCM is the product. 7*13=91 ■

Answer 3

91