Puzzles Questions

3.
 
Answer
E
The lines of the third pentagon are determined by the lines of the first two. All lines are carried forward, but when two lines coincide in the same position in the first two figures they appear as a curved line in the final figure.

4. Which is the odd number out?
  462, 683, 385, 198, 253, 781, 594
Answer
683.
In the other numbers add the first and last digits to arrive at the middle digit.
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