Missing Letter Puzzles Questions with Answers

9. Which letter is missing from the wheel?
  What is the next number?
Answer
Ans = Q.
Moving clockwise letters advance in steps of 9, 7, 5, 3 and 1.
10. Which letter should go in the empty circle?
  What is the next number?
Answer
Ans = D.
Starting 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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