Which set of symbols should replace the question marks? (Two sets of six circles are shown; the second set has hidden results.) Choose from the options labelled in the figure.
An electrical circuit wiring four lights depends on switches A, B, C and D. A toggles lights 1 and 2, B toggles lights 2 and 4, C toggles lights 1 and 3, D toggles lights 3 and 4 (on becomes off and off becomes on). Switches D, B, A and C are thrown in turn and Figure 1 becomes Figure 2. One switch is not working. Which one?
Which figure completes the analogy? (Three circles with dots are to a fourth circle as another three circles are to which option?) Choose from the options labelled in the figure.
The letters A B C D E F G H are written in a row. What letter is three to the right of the letter immediately to the left of the letter three to the left of the letter two to the right of the letter F?
Only one group of six letters below can be rearranged to spell a six-letter English word. Which group? BEOPLA, ICKTEA, WLONUD, XOLEIN, ARHCLO, HATOND, INMETL
An electrical circuit wiring four lights depends on switches A, B, C and D. A toggles lights 1 and 2, B toggles lights 2 and 4, C toggles lights 1 and 3, D toggles lights 3 and 4 (on becomes off and off becomes on). Switches D, A, B and C are thrown in turn and Figure 1 becomes Figure 2. One switch is not working. Which one?