Not the number, but the "thing" itself. It's a snap to fold a piece of paper in half, thirds[0], quarters, sixths, eighths, (etc), but I'm not aware of a trick

Not the number, but the "thing" itself. It's a snap to fold a piece of paper in half, thirds[0], quarters, sixths, eighths, (etc), but I'm not aware of a trick that lets you divide a sheet into tenths. [0] Higher powers of three seem tricky too.