Question

There is a magazine made up of 8 large sheets of paper folded in half. The magazine has 32 pages altogether. The second sheet contains pages 3, 4, 29 and 30. If I pick up a sheet containing page 19, what are the other pages that this sheet contains?

Answer 1

Answer:

First of all, you had to work out that page 19 was on the back of page 20. Then you had to notice that the numbers were arranged in pairs, with the first and last number adding up to 33 and similarly the second and second last number again adding up to 33.

Then the other pages with 19 and 20 are:

33 -19 =14

33 - 20 = 13

So the four pages on this sheet are 13, 14, 19 and 20.