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4.

a. yes
b. no

Solution. yes ­ the cube has been rotated by 90 degree toward the south. hiding one of the visible sides while showing a new one.
Answer. a

5.

a. yes
b. no
Solution. No­ even thought it looks as if the cubes have been rotated by 90 degree to south, it we look at the diagram with two dots, the digram has not

rotated by 90 degree.
Answer. b

6.

a. yes
b. no
Solution. No, even though two of the symbols are same, there orientation have not changed whereas a new symbol has emerged. We can say that this is a

different cube.
Answer. b

7.

a. yes
b. no
Solution. Yes: the cube has been rotated by 90 degree toward the south. hiding one of the visible sides while showing a new one.
Answer. a