How can you separate red beads from green beads?

Add water, dissolve sugar, filter/strain out silver beads, evaporate water to retrieve sugar

There are 47 red beads. Since each group is a set of 3 beads (1 red and 2 other color), there will be 47 groups (since 141-47-47-47=0). Therefore, 47 of them are red and the other two groups of 47...

A magnet will attract the iron beads but not the glas beads

It really depends on how many beads you are using if u was using 12 beads there will be 6 beads.

Use static electricity or gravity. Get a statically charged object (static is always around when you don't want it) to draw the Styrofoam away from the glass. Or put them in a container and shake...