Answer:40
Step-by-step explanation:
To find when Avery will get all three mails of sports,model rail road&music again we need to find the LCM of
5,10,8
LCM of 5,10,8
5& 10 are multiples of 5 and thus we left with 1,2
and 2 & 8 are multiples of 2 thus we left with 1,4
and we get 40 as LCM
that is after 40 day Avery will get the three mails again on same day .