Which number replaces the question mark?
...
Which number replaces the question mark?
12
15
18
21
Correct answer is A
The value at each corner of the diagram equals the difference between the sums of the numerical values of the letters in the boxes adjacent to the corner.
Which number replaces the question mark? ...
Which letter replaces the question mark? ...
What time should the last watch show? ...
Which letter replaces the question mark? ...
Where should the minute hand be put on the bottom clock? ...
Which letter replaces the question mark? ...
Which picture cube does this shape make? ...
What time should last watch show? ...