Do you think you know Roman numerals? Test yourself here!
The Egyptians
The Aztecs
The Greeks
The Romans, duh
5
10
15
20
50
80
100
120
MMXXX
MMXXI
CCXXI
MCXXI
3
5
8
9
IIII
VI
V
IV
14
16
17
20
1983
1751 1960
1960
1912
On a clock
Scales found in the bathroom
In a vehicle's instrument cluster
On food sellby dates
100
200
300
400
10 questions remaining