Puzzles Questions

1. Draw the face in the empty box which continues this pattern.

Working in columns, as you move down, one feature is removed with each step, and the smile alternates with the frown.
2. Which two characters go into the empty boxes at the bottom of the table?
  What is the next number?
17 and M
Numbers on the left descend in prime number order, starting with 3. Values of the right hand letters also follow the prime order sequence, this time starting with 2.

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