Words Puzzles

13. Fill in the empty box with the correct letter ?
 
Answer
F
In columns : the central number equals the sum of the numerical value of the top and bottom letters.
14. Which letter should go in the empty circle?
 
Answer
D
Starling at the top left of the first figure and moving in a Z shape, letter values increase by 2, then 3, then 4, 5, and 6 to reach the top figure in the next diagram.
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