I'm stuck here, please help

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

Ineed someone to me answer my question i have to have this done and knocked out

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?