Answer:
30 days
Step-by-step explanation:
The common multiples of 15 and 6 are 30, 60, 90 etc and because it increases by 30 each time we can find out that he will play both football and basketball together in thirty days!
, 3, 5 are the prime factors of 60.
#1 is y=1 ill give you the others in a min.