Question

There are 14 cars waiting to cross the ferry. The ferry can carry 3 cars at one time. How many trips will the ferry make to get all 14 cars across?

Answer 1

it would take the ferry a total of 5 trips to carry all 14 cars across

Answer 2

The ferry can carry 3 cars at one time

There are 14

3 x 4 = 12 (which is not enough to carry all 14 across)
3 x 5 = 15 (which is more than enough space to carry all 14 across)

So the ferry needs to make 5 trips in all

hope this helps