3.
Which switch does not work?
Switch A turns lights 1 and 2 on/off;
Switch B turns lights 2 and 4 on/off;
Switch C turns lights 1 and 3 on/off
White = On
Black = Off
Switches C, A and B are flipped with the result that
this 
turns into this
Which switch does not work?
4.
When the above is folded to form a cube, which is the only one of the following that can be produced?
8.
Which is the missing section?
10.
Which is the missing section?
11.
Which is the missing section?
15.
Which is the missing tile?
16.
To which hexagon can a dot be added so that both dots then meet the same conditions as the two dots in the hexagon below?
17.
Which piece in the answer section, when fitted into the piece below, will form a perfect square?
19.
Which is the missing section?
25.
Which is the missing figure?
29.
Which is the odd one out?
31.
Which is the odd one out?
34.
Which is the missing tile?
35.
Which shield has the most in common with the shield below?
