The jelly marbles are made and sold by Steve Spangler Science. They are $10 for about 1000 marbles (50 g) and kit. See related link "Jelly Marbles" for more information
He will have 13 blue marbles and 10 green marbles.
12 blue marbles
24
The fraction is 3/15.
The jelly marbles are made and sold by Steve Spangler Science. They are $10 for about 1000 marbles (50 g) and kit. See related link "Jelly Marbles" for more information
He will have 13 blue marbles and 10 green marbles.
You make up the mixture for the first colour that you want the jelly to be, and pour a layer of it into the required container. You leave this to set completely, then make up the colour of jelly that you want the next layer to be. Pour a layer of this jelly on top of the first layer of jelly that has now set. Allow to set again. (Now 2 layers of jelly). Repeat with all required colours. The main issue with this is that jelly takes a long time to set - 3-5 hours per layer, depending on how thick the layers are and how quickly you can cool the jelly down. For an interesting effect, tilt the container which you're setting the jelly in, for diagonal layers of jelly. (Do the final layer untilted, otherwise there will be an uneven base for the jelly to be turned out onto).
10 Green marbles, 13 Blue marbles.
He has 10 green marbles.
There could be 12 white marbles and 16 red marbles
at least 39 blue marbles
8:6
12 blue marbles
24 red marbles
12 blue marbles
If there are 20 red marbles and 40 blue marbles, the ratio of red to blue is 1 over 2. The number of white marbles does not matter.