Roman Numerals- 2 - Free MCQ Practice Test with solutions, Class 5 Mathematics

To convert the Roman numeral XXIII to its Arabic equivalent, break it down as follows:

• X represents 10.
• Another X adds another 10, totaling 20.
• III at the end stands for 3.

Adding these together:

• 20 (from XX) + 3 (from III) = 23.

Therefore, XXIII in Arabic is 23.

The series uses Roman numerals: XX, XXV, _____, XXXV, XL.
Each number in the series increases by five.
Starting with XX (20), adding five gives XXV (25).
Continuing, 25 plus five equals XXX (30).
Thus, the missing number is XXX.

The series follows a +2 pattern. Hence, XVIII should be the next number in the series. So, (a) is the right option.

XC = 90
LXXX = 80
LXX = 70
LX = 60

The Roman numerals correspond to the numbers:

• XIX for 19
• XXI for 21
• XXIV for 24
• XXV for 25

Among these, the classifications are as follows:

• 19, 21, and 25 are odd numbers.
• 24 is an even number.

Therefore, XXIV (24) is the odd one out because it is the only even number in the set.

The correct answer is Option B - XL

X represents 10, V represents 5, I represents 1, and L represents 50.

XVI = X + V + I = 10 + 5 + 1 = 16.

IV = 5 - 1 = 4, so XXIV = X + X + IV = 10 + 10 + 4 = 24.

16 + 24 = 40.

40 is written as XL because placing X before L means 50 - 10 = 40.

Thus the sum expressed in Roman numerals is XL, confirming Option B - XL.

The Roman numeral XV represents the number 15.
To find the missing digit, subtract from 15 to get X, which is 10.
Thus, the calculation is 15 - 5 = 10.
The missing digit is V.

The correct answer is Option C - IL

I is 1, V is 5, X is 10, L is 50, C is 100, D is 500 and M is 1000.

When a smaller symbol appears after a larger one, their values are added; when a smaller symbol appears before a larger one, it is subtracted, but subtraction is allowed only in specific pairs.

I may precede only V and X; X may precede only L and C; C may precede only D and M.

In IL the symbol I appears before L, but I is not allowed to precede L; therefore IL is not a valid Roman numeral.

49 is correctly written as XLIX, because XL represents 50 - 10 = 40 and IX represents 10 - 1 = 9, so XLIX = 40 + 9 = 49.

The correct answer is Option D - XLIX

Convert each Roman numeral to its Hindu-Arabic value step by step.

For XLII: XL = 40 and II = 2, so XLII = 42.

For XLIV: XL = 40 and IV = 4, so XLIV = 44.

For XLVI: XL = 40 and VI = 6, so XLVI = 46.

For XLIX: XL = 40 and IX = 9, so XLIX = 49.

Since 42, 44 and 46 are even numbers and 49 is odd, XLIX is the odd one out.

The number 25 is represented as XXV. X stands for 10 and V stands for 5. So, XXV will make 25. Hence, (b) is the right option.