Justin bought 12 souvenirs during 6 days of vacation. How many days will Justin have to spend on vacation before he will have bought a total of 20 souvenirs?

Answer 1

Justin buys 12 souvenirs during 6 days, so he buys 12/6 = <<12/6=2>>2 souvenirs per day.
Justin needs 20 - 12 = <<20-12=8>>8 more souvenirs.
It will take him 8/2 = <<8/2=4>>4 more days to buy the remaining souvenirs.
So in total Justin will have to spend 6 + 4 = <<6+4=10>>10 days of vacation before he buys a total of 20 souvenirs. Answer: \boxed{10}.