4
There are only four different configurations.
Ignoring rotations, there are 3 distinct solutions.
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
24 of them
To determine the number of different size cubes that can be made with 64 multilink cubes, we need to find all the factors of 64. The factors of 64 are 1, 2, 4, 8, 16, 32, and 64. These factors correspond to the possible dimensions of the cubes that can be formed using the multilink cubes. Therefore, there are 7 different size cubes that can be made with 64 multilink cubes.
13
You can make four.
If you have got enough cubes, as many as you like.
You could try 14!
93
3
You can have the 18 as prisms, OR.. they can be cut up into an infinite number of different prisms, as many as your tools for cutting it can make.
about 10
With no repetition of shapes (symmetry) we have obtained 26 different combinations.
The answer depends on the number. Note that the question does not require the solids to be in the form of cubiods (rectangular prisms).
4