20. A rectangular floor of dimensions 10' * 8' (120" * 96") has to be tiled using the same type of square tiles. Square tiles are available in various dimensions 1", 2", 3", 4", …, 48". What is the size of the largest square tile that can be used to tile the floor completely, without breaking any tile ?

1. 32"

2. 24"

3. 12"

4. 8"

Correct Answer :