Logic Puzzles Questions and Answers

11. What number should replace the question mark?
  What is the next number?
Answer
Ans = 21.
Divide each number in the corner by 7 and add to obtain the number in the centre.
12. Which is the missing circle?
  What is the next number? What is the next number?
Answer
Ans = A.
The line moves 45deg at each stage and alternates straight/curved. The dot moves on the line/middle/bottom and back again.