Question

Three boys go to the same school. Every boy needs two cubes of the same color to play a game, but the cubes that different boys have are not necessarily different color. A teacher has red, blue and green cubes in one drawer. If the teacher draws the cube without looking, what is the least number of cubes that need to be pulled out to be sure that every boy can get two cubes of the same color?

Answer 1

Answer:

In first three cases boy already have two cubes of the same colour. ... The least number of cubes that need to be pulled out to be sure that every boy can get two cubes of the same color is. 3\cdot2=6.3⋅2=6.