The expression 5(10x10) relate to 10x10 in that it is 5 times 10 x 10.
10x10------100
10x10 egquals 100
10x10 = 100
10x10=102 or 10 squared.
35+40 divided by 10x10 is 0.75
100
50
100
100
18 10x10-inch tiles.
It depends on how big the bricks are? How big are they? And does 10X10 mean 10X10 metres or feet?