This is an example of a completed Factor Line Sudoku puzzle.
Each line has a circle at one end, every value on the line has to be a factor of the value inside the circle.
A factor is a number that can be divided into another number without leaving a remainder. For reference, these are the factors of each value,
- 1, 2
- 1, 3
- 1, 2, 4
- 1, 5
- 1, 2, 3, 6
- 1, 7
- 1, 2, 4, 8
- 1, 3, 9
Note that the line does not need to contain every factor (but it may do).