20
They're just bog standard six-siders, honest!
- Front left: 4 on top, 6 and 2 facing.
- Rear left: 1 on top, 2 and 3 facing.
- Front centre: 3 on top, 6 and 5 facing.
- Rear right: 2 on top, 6 and 3 facing.
- Front right: 5 on top, 6 and 4 facing.
Only works from 1-3. 4 has 5 strokes (6 lines), for example.
You only count the four central strokes for four when its written that way, how those kanji came about or how theyre taught to children, is that the stroke number is equal to the numbers value up until you reach ten.
That doesn't work at all though? 五, 六 have 4 strokes, and 七, 八, 九, 十 have 2 strokes.
And the die uses the old form of 5: 伍