On most dartboards it is six (6), but some dartboards have concentric circles.
6
3
1 is between 20 and 18 on a dartboard.
Number 14
It is 4.
Traditionally, 20 lies in between 1 and 5.
3
3
3
3 oclock
1 is between 20 and 18 on a dartboard.
Number 14
Zero!
9
20
It is 4.
19
17