4

well there is that too. XD

55555
5
__55
____55
___55
555

6!

-||||- ||

key: | = 1 tally
- - = the slash of a tally mark made to show a set of five

(what's a good way to write tallies?)

that looks good to me.

eight.

-||||- ||||

how about roman numerals?

X

ten.

11
>.>

XII

xD

XIII

XIV

XV

XVI___XVI_____XVI_______XVI___XVIXVIXVI
_XVI_XVI_______XVI_____XVI_______XVI
___XVI__________XVI___XVI________XVI
_XVI_XVI_________XVI_XVI_________XVI
XVI___XVI__________XVI________XVIXVIXVI

XVII

XVIII

XIX