Prime numbers raised to the 4th power can make five different rectangles. They can make the following sizes:
1 height by n4 width
n height by n3 width
n2 height by n2 width
n3 height by n width
n4 height by 1 width
24 = 16; rectangles would be 1 x 16, 2 x 8, 4 x 4, 8 x 2, and 16 x 1
34 = 81; rectangles would be 1 x 81, 3 x 27, 9 x 9, 27 x 3, and 81 x 1
5 x 8 = 40, so 40 tiles are in this rectangle.
1*100, 2*50, 4*25, 5*20, 10*10.
You can make about 5
5 rectangular shapes. But 9 if, for example, a 3*12 rectangle is considered as being different from a 12*3 rectangle.
Any multiple of 5 will do.
Using all five tiles, only one rectangle can be made. (1 tile wide by 5 tiles long) Using less than all five tiles, you could make six different rectangles. (squares are technically rectangles too.) The rectangles possible would be: 1 tile wide by 5 tiles long, 1 wide by four long, 1 wide by 3 long, 1 wide by 2 long, 1 wide by 1 long, and 2 wide by 2 long.
3*5 = 15 tiles.
You could make 5 rectangles with 10 squares
60
25
5 x 8 = 40, so 40 tiles are in this rectangle.
1*100, 2*50, 4*25, 5*20, 10*10.
You can make about 5
5 rectangular shapes. But 9 if, for example, a 3*12 rectangle is considered as being different from a 12*3 rectangle.
Any multiple of 5 will do.
1*45 3*15 5*9 and the same rectangles turned through 90 degrees.
Five. If one + is one tile, +++++ is five tiles long.