Fourteen-year-old Shirley collects one coin from every country that she visits. If she currently has collected 18 coins and wants to accumulate at least 82 coins by the time she is 30, what is the minimum number of countries she should visit on average each year until then?

Answer 1

Well 30- 14 = 16 years to collect
The coins she wants are 82 and she has 18
so
82 - 18 then divide by the 16 years she has to collect : )

Answer 2

thx