Question

LCM by prime factorization of 12 and 30

Answer 1

answer is 60

$2 |12 \\ 2|6 \: \\ 3 |3 \\ |1$

$2 |30 \\ 3 |15 \\ 5|5 \\ |1$

$|2| \times |3| \times 2 \\ |2| \times |3| \times 5$

$2 \times 3 \times 5 \times 2 = 6 \times 10 = 60$