Numbers Puzzles

3. Which number completes this puzzle?
  What is the next number?
Answer
43
In each circle, starting top left and moving clockwise, multiply each number by 3 and subtract 5 to give the next number.
4. Which number goes in the empty circle?
  What is the next number?
Answer
3
Figures in the centre column equal the sum of the numbers in the right and left.
12345678910

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