Introduction
The dartboard most commonly found in pubs, clubs and homes is the clock or trebles board. It consists of a circle of 20 segments numbered from 1 to 20 in a seemingly random fashion.
The small red circle at the centre is called the bullseye; the thin green ring that surrounds this is the 25 ring. The treble ring is about half way to the edge of the board and the
double ring is at the rim of the circle. If a dart lands, for instance, in the segment marked 17 and is within the treble ring, a treble 17 (51) has been scored. A picture of a standard
dartboard is shown below.

Exercises
Work out the answers to the questions below and fill in the boxes. Click on the
button to find out whether you have answered correctly. If you are right
then will appear and you should move on to the next
question. If appears then your answer is wrong. Click
on to clear your original answer and have another go.
If you can't work out the right answer then click on
to see
the answer. 