Brainteasers

21st January 2005 at 00:00
Read all about it

A Sunday newspaper is made up of a number of double sheets, with a single sheet placed in the middle.

When the paper is taken apart, you can see that page 26 and page 37 are on the same sheet of paper.

What is the page number of the back page?

10 Concentric circles are drawn.

The smallest circle has a radius of 1cm.

The area between any two consecutive circles is equal to the area of the smallest circle.

What is the radius of the largest circle?

SOLUTIONS Read all about it (age 7-11) The pages must be numbered like this: Since the centre pages are 31 and 32, half the paper consists of 31 pages, and the number on the back page is 62.

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