Respuesta :

15 is the answer because 5 is a prime factor so 5 into 105=21 and 3 is another prime factor so 3 into 21=7 and 7 is another so 7 into 7=1 and 5+3+7=15
puppytap

Answer:

15

Step-by-step explanation:

I got that answer on test and i got correct