alleryHow would a stonemason carve the number 400?
ACCCC
BDC
CCM
DCD
Answer & Solution
Correct answer: D. CD
1. Four hundred is a standard subtractive form.
2. C before D means 500 minus 100, which is CD.
3. CCCC is not standard, DC means 600, and CM means 900.
_Source: Wikipedia, Roman numerals, Standard form_
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