There are three pairs of similar marbles of three different colors, Red Green and Blue.
In each pair, one is light and the other heavy. All light marbles are identical in weight and all heavy marbles are identical in weight.
The difference in light and heavy is miniscule. The problem is you have a weighing balance but no weights and measures.
If you were allowed three attempts at weighing, you could weigh three pairs three times separately and segregate light from heavy easily. But that's so mundane.
So your task is that you are allowed only two attempts at weighing and must still succeed in segregating the three pairs.
I found three distinct ways to do it. How many ways can you find?