The most common number system in the Exander universe is the Imperial number system.

Imperial Number System

Numeral Cardinal Ordinal
0 zero zeroth
1 one first
2 two second
3 three third
4 four fourth
5 five fifth
6 six sixth
7 seven seventh
8 eight eighth
9 nine ninth
a annet anneth
b bet beth
c cat cath
d det deth
e et eth
f fet feth
10 ten tenth
11 eleven eleventh
12 twelve twelfth
13 thirteen thirteenth
14 fourteen fourteenth
15 fifteen fifteenth
16 sixteen sixteenth
17 seventeen seventeenth
18 eighteen eighteenth
19 nineteen nineteenth
1a anneteen anneteenth
1b betteen betteenth
1c catteen catteenth
1d detteen detteenth
1e etteen etteenth
1f fetteen fetteenth
20 twenty twentieth
30 thirty thirtieth
40 forty fortieth
50 fifty fiftieth
60 sixty sixtieth
70 seventy seventieth
80 eighty eightieth
90 ninety ninetieth
a0 annety annetieth
b0 betty bettieth
c0 catty cattieth
d0 detty dettieth
e0 etty ettieth
f0 fetty fettieth