Question 12
Minh has five boxes: one red, two blue and two yellow. He stacks all five with these rules:
• Adjacent boxes have different colours.
• The top box is not yellow.
• The middle (third) box is not red.
• A yellow box is immediately below the red box.
• The bottom box is not yellow.
Give the colours in order from bottom to top.
• Adjacent boxes have different colours.
• The top box is not yellow.
• The middle (third) box is not red.
• A yellow box is immediately below the red box.
• The bottom box is not yellow.
Give the colours in order from bottom to top.