Tag: maths

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Questions Related to maths

Multiple choice roman numbers and numbers upto hundred roman numerals knowing our numbers maths

X can be subtracted from

  1. $L$ and $ C$
  2. $D$ and $ M$
  3. $D $ only
  4. $M $ only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

While writing Roman Numbers, do not subtract a number from one that is more than  $10$  times greater (that is, you can subtract  $1$  from $10 [IX]$  but not $ 1$  from $ 20$  there is no such number as $ IXX.)$
Hence,$ X (10)$  can be subtracted from $ L (50) \ and \ C (100)$

Multiple choice roman numbers and numbers upto hundred roman numerals knowing our numbers maths

Write $39$ in roman numbers

  1. XXXIX

  2. XXXXI

  3. XXXX

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
To convert $39$ to Roman Numerals we need to split it up into place values (ones, tens, hundreds, etc.), like this:

Place Value Number Roman Numeral
Tens            $30$ $XXX$
Ones               $9$ $IX$


Please note, we skipped place values that equal 0.

You then combine them all together (starting from the top) to get $XXXIX.$
So option A is the correct answer.

Multiple choice roman numbers and numbers upto hundred roman numerals knowing our numbers maths

Roman numerals for $498$

  1. CDCXVIII

  2. CDCXIV

  3. CDXCVIII

  4. CDXCVII
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Roman numerals are represented by the following letters:

I = 1

V = 5

X = 10

L = 50

C = 100

D = 500

M = 1000

If a numeral is followed by another numeral of lower denomination, the two are added together;

if it is preceded by one of lower denomination, the smaller numeral is subtracted from the greater.

400 + 90 + 8 = CDXCVIII

$CDXCVIII=498$

Multiple choice roman numbers and numbers upto hundred roman numerals knowing our numbers maths

Raju is 22 years old and Ramu is 19 years old. Write the diference of their ages in Roman system.

  1. III

  2. XXDI

  3. XXXLII

  4. XXXLL
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Raju is 22 years old and Ramu is 19 years old.

$\text{Difference between Raju age and Ramu age=19-16=3years}$
$\text{In roman three is represented as III}$
Option A is correct.