Originally Posted by SnapDragon
Numbers are not uniquely encoded; different symbols can mean the same number. The up stroke is worth 1, right is worth 2, down is worth 3, and left is worth 4... and if multiple strokes are used, you just sum them.
So, for instance, 3 can be represented as up + right OR down. A couple of the classrooms have posters that make this clear.
thanks for pointing this out