After a player has added a tile to the layout, the two open ends are totaled. If this total is a multiple of five, three or both, the player immediately scores the number of fives and/or threes in the total. The possible scoring totals are:

3 - 1 point
5 - 1 point
6 - 2 points (two threes)
9 - 3 points (three threes)
10 - 2 points (two fives)
12 - 4 points (four threes)
15 - 8 points (three fives and five threes)
18 - 6 points (six threes)
20 - 4 points (four fives)