Question

1. To encourage public transportation, Avery wants to give some friends envelopes with bus tickets and subway tickets in them. If she has 15 bus tickets and 10 subway tickets to split equally among the envelopes, and wants no tickets left over, what is the greatest number of envelopes Avery can make?

Answer 1

5 .This is called the greatest common factor.

You can list all the factors(ways to divide) of each number and find the biggest one.

15'1,3,5,15

10'1,2,5,10

The greatest they share is 5