# Qual è il minimo comune multiplo di 9 e 15?

45

#### Spiegazione:

First we need to write out the prime factors of 9 e 15.

9:3xx3
15:3xx5

Now we group them together:
9:(3xx3)
15:(3)xx(5)

Next we take the largest groups of each number:
9 ha due 3s while 15 ha 1 5.

We multiply the largest groups together:
LCM(9,15)=3xx3xx5=45

45/15=3, 45/9=5