Question 15
Each of the numbers 3, 4, 5, 6, 7 and 8 is to be placed in each circle in the below diagram. The sum of the numbers in each square is 20. What is the sum of the numbers in the shaded circles?

Self-study clarification (editorial): use each of the six numbers exactly once.

Self-study clarification (editorial): use each of the six numbers exactly once.