Solution: To find the least common multiple (LCM) of 12 and 18, factorize both: $12 = 2^2 \cdot 3$ and $18 = 2 \cdot 3^2$. The LCM takes the highest powers of all primes: $2^2 \cdot 3^2 = 4 \cdot 9 = 36$. Thus, the LCM is $\boxed36$. - go-checkin.com