It smells like blue paint, pours like green paint, and it looks like a red truck. What is it?

Question

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls.
What is the minimum number of balls will you have to pick up so that you have at least 4 balls of the same colour?

Answer 1

Answer: Red paint. All paint smells and pours the same. It is the same color as the red truck.