Marbles are generally made from recycled glass. However they are occasionally made of plastic. (These are mostly used in Board Games and such).
Mike
limestone and pentelic marbles
In order for 4 red marbles to be one-third of a group and 3 blue marbles to make up one-fourth of the same group the number has to equal 12.
There has to be 12 marbles in the group. If 4 are red that is 1/3 of 12 and if 3 are blue that is 1/4 of 12. The rest can be any color. That is how you explain how four red marbles can make up 1/3 of a group of marbles and three blue marbles make up 1/4 of the same group :)
minus one red marble plus one blue marble
What materials make up the earth's surface?
Uranium marbles contain up to 3 % uranium; these marbles are fluorescent under an UV light.
i made a fun rpg with a piece of paper pen little marbles and a little notebook to keep track of my stats
what are magic marbles ,they sound cool! do we have them in England
Make sure you have a lot of used materials, such as cardboard, pulleys, levers, screws, wood, marbles, and anything else. Use the parts to make your machine.
The materials that make up noctilucent clouds are tiny water Ice crystals and dust particles.
Set up the problem as: y=number of yellow marbles & 4y=number of blue marbles. 40=y+4y or 40=5y or y=8. Therefore number of blue marbles is 4*8 = 32.
Steal there marbles.