This week’s puzzle is inspired by 1729 Maths School’s logo. Use the clues below to write a positive integer in each triangle.
Clues:
- Each triangle contains an integer
- Triangles ‘pointing right’ contain primes
- All the primes are distinct, and none exceeds 20
- Triangles ‘pointing left’ do not contain primes
- Each non-prime is equal to the product of the primes around it (i.e. their triangles share an edge)
- An odd number of triangles contain even numbers
- The sum of the numbers in white triangles is equal to the sum of the numbers in green triangles.
