6 straws are needed
8
Five. Four triangles and one square make up a square pyramid.
12 straws
<X X> It should look kinda like the example above. Except it would be squares lol. Make two crosses with the 4 long straws put the ends of these together so that one square is made then make two right angles with the four short straws and place them at the other side of each cross to make three squares in a diagonal line. :)
8 straws.
6 straws are needed
12
8
depends on the dimensions of the 4 sides
I need 100 straws.
8
8
15 straws are needed
16 straws.
10
assuming the straws do not bend, you would need six