multiples of 13 and 18

Question

 What is the least common multiple

Answer 1

To find the least common multiple (LCM), factor each number, identify common and uncommon factors, and then multiply the common factors by the uncommon factors.

 

18 = 2 x 3²

13 = 13 (a prime number, cannot be factored further)

 

Common factors:  None

 

Uncommon factors: 13, 2, and 3²

 

LCM = 13 x 2 x 3² = 234

Answer 2

13, 26, 39, ...

18, 36, 54, ...

 

Keep going with both until you find a match.