Puzzles to test mathematical skills. Set by Anita Straker. Solutions on page 39. More brainteasers on www.tes.co.ukteacherbrainteasers
In this circle, the numbers 1 to 9 are placed so that each "slice" and each "ring" have a total of 15.
Now place the numbers 1 to 16 so that each slice and each ring have a total of 34.