Question

I have to make a 4x4 grid using 5 colors. 4 squares are blue, 3 red, 3 green, 3 yellow and 3 white. They have to be arranged so that no two of the same color are in line vertically, horizontally or diagonally.

Answer 1

blue....... white....... blue....... yellow
red ........green .......red...........white
white........yellow.......blue.........green
blue .........green ...... red .........yellow