Question

A group of 20 friends is planning a road trip. They have 3 cars that seat 4 people, 3 cars that seat 5 people, and 1 car that seats 6 people. What is the fewest number of cars they can take on the trip if each person needs his or her own seat?

Answer 1

4 cars.

Explanation:

For the fewest number of cars we need to choose the bigger cars first.

We could have one 6 seater car so that leaves 14 people.

The least number of cars to seat 14 people is 2 5 seater cars and 1 4 seater.