Test: Roman Numerals- 2 - Class 4 MCQ

There are 7 basic numerals in Roman numeration system. They are l, V, X, L, C, D and M.

• In Roman numerals, subtraction is used to create numbers like IV (4) or IX (9).
• The numeral V represents 5 and is never placed before another numeral to indicate subtraction.
• This is because V is a foundational value and serves as a base for other numerals.
• Other numerals, like I (1) and X (10), can be subtracted from larger values (like V and L, respectively).

IXIV is meaningless.

25 + 14 = 39 = XXV + XIV = XXXIX  
∴ 4 symbols are needed.

0 has no Roman numeral.

• C − X = 100 − 10 = 90 = XC is correct.
• XI - IX = (10 + 1) − (10 − 1) = 11 − 9 = 2 ≠ XX is  wrong.
• DC − C = 500 + 100 − 100 = 500 = D is correct,    
• LXI − LIX = (50 + 10 + 1) − [50 +(10 − 1)] = 61 − 59 = 2 = II is correct,

• 516 < DCVI is correct as DCVI = 500 + 100 + 5 + 1 = 606           
• CCLVII = 100 + 100 + 50 + 5 + 1 + 1 = 257 ≠ 256
• CDVIII = (500 − 100) + 5 + 1 + 1 + 1 = 400 + 8 = 408
• MD = 1500

The greatest number formed is DCLX = 660 and the least is CDXL = 440. Their difference is 220 = CCXX.

• 37 = XXXVII which can be made with 10 match sticks.
• 39 = XXXIX ® 9 match sticks
• 27 = XXVII ®  8 match sticks
• 35 = XXXV = 8 match sticks

The greatest 3-digit number is 999 = 900 + 90 + 9 = (1000 − 100) + (100 − 10) + (10 − 1)
999 = (M−C)+(C−X)+(X−I)
Rewrite the terms after subtraction,
⇒999 = CM+XC+IX
Join the terms,
⇒ 999 = CMXCIX.