Puzzles Questions with Answers

1. Which number should go in the empty box?
Ans = 8.
For each number on the left, starting at the top, double it and subtract 1, then 2, 3, 4 etc. to give the right hand number.
2. Which number needs to be added to complete the last wheel?
  What is the next number?
Ans = 42.
Divide each circle into left and right halves. The top right value equals the sum of the left hand numbers, the middle right value equals the product of the left hand numbers and the bottom right hand value equals the sum of the squares of the left hand numbers.

Page 1 of 7