Riddle Me This: Colored Weights

The solution is to find the heavier weight of each color you only need to use the balance scale twice. First, you must weigh a red and white weight against a blue and white weight.

If the pans balance: You can be sure that there is a heavy and a light weight on each pan. Take both the red and blue weights off the scale and leave the white weights on each side. This will show you which of the white weights in the heavier one, which will then show you whether the red or blue weight that was just on the pan was the heavier one, which will then allow you to to by process of elimination determine the weight of the red and blue weight that were never on the pan.

If the pans do not balance: You can be sure that the white weight on the side of the scale that went down is the heavier of the two white weights. To find the heavier weight of the red and blue pair, you must take the red weight that you just weighed and weigh it against the blue weight that has not yet been on the scale. Seeing what happens here plus remembering what happened when you made the first weighing will allow you to correctly label each weight.