Puzzles - Logical puzzles

4.
Answer
:
U
Explanation
:
Multiply the numerical values of the letters in each pair to give the 3 digit result in the spaces above.

5.
Answer
:
12
Explanation
:
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.

6.
Answer
:
C
Explanation
:
[NIL]