Seven Regions Place the digits 1 to 7, one in each region, so that the circles all have the same total
Can you show that:
- you cannot have a circle total of 16 with 4 in the center
- you cannot have circle totals greater than 19 or less than 13
- you cannot have anything other than 1 in the center for a circle total of 13
The image is linked down below! Please trust and click the file for the image