Tag: maths

Questions Related to maths

The number of matchsticks that can be used to write 23 in Roman system are

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

  1. 6

  2. 7

  3. 8

  4. 9

Show answer
Correct Option: B
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.

 

23 = XXIII
Therefore, Number of matchsticks required is 7.

Write $14$ in numeral form.

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

  1. $IV$

  2. $XIV$

  3. $XVI$

  4. $XV$

Show answer
Correct Option: B
Explanation:

In Roman numeral form, 

$10 = X$
$4 = IV$

$\Rightarrow 14 = XIV$

The difference between Roman numerical M and C is

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

  1. MC

  2. CM

  3. CX

  4. LX

Show answer
Correct Option: B
Explanation:

$M=100$

$C=50$
$M-C=100-50=50$
$M-C=M$
So option $B$ is correct.

Convert the given Roman Numerals  'XC' and 'C' in English numeral and then find its difference.

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

  1. $100$

  2. $20$

  3. $10$

  4. $12$

Show answer
Correct Option: C
Explanation:

In Roman numeral form, 

$C = 100$
$\Rightarrow XC = 100-10 = 90$

$\therefore$ Difference between $C$ and $XC = 100-90 = 10$ 

In Roman Numeral $C$ has value of

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

  1. $100$

  2. $50$

  3. $1000$

  4. $500$

Show answer
Correct Option: A
Explanation:

In Roman numeral form, 

$100 = C$
$50 = L$
$1000 = M$
$500 = D$

Express $19$ in Roman numeral:

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

  1. $XIX$

  2. $XXI$

  3. $XX$

  4. $XI$

Show answer
Correct Option: A
Explanation:

In Roman numeral form, 

$10 = X$
$9 = IX$

$\Rightarrow 19 = XIX$

Sumit scored $CDLXXXII$ marks in the annual examination. What is the Hindu-Arabic number for this Roman Number?

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

  1. $500$

  2. $432$

  3. $482$

  4. $453$

Show answer
Correct Option: C
Explanation:

Hindu arabic number for $CDLXXXII=482$

Hence the correct answer is option C.

Roman numerical for the greatest three digit number is ________ .

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

  1. $IXIXIX$

  2. $CMXCIX$

  3. $CMIXIX$

  4. $CMIIC$

Show answer
Correct Option: B
Explanation:

Greatest $3$ digit number is $999$

Roman numeral for $ 900 = CM$
Roman Numeral for $ 90 = XC$
Roman Numeral for $ 9 = IX$
Roman Numeral for $ 999 = CMXCIX$

Find the value of $MMDCCCLX-MMDCCLIII$.

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

  1. $XCIX$

  2. $LXII$

  3. $XC$

  4. $CVII$

Show answer
Correct Option: D
Explanation:

$MMDCCCLX-MMDCCLIII$

= $2860-2753$
= $107$ = $CVII$

Which of the following statements is/are INCORRECT?
(i) Eighty four in Roman numeral is written as $CXXXIV$
(i) There are seven zeroes in $1$ crore.
(iii) There are ten thousand milligrams in $1kg$
(iv) The smallest $4$-digit number formed by using all the digits $4,3,0,8$ without repetition is $3048$

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

  1. Both (i) and (iii)

  2. Both (i) and (iv)

  3. Only (i)

  4. Only (ii)

Show answer
Correct Option: A
Explanation:
(i) $84=LXXXIV$
(ii) $1\quad crore=10000000$
(iii) $1kg=1000g=1000\times 10000mg=10000000mg$
(iv) Smallest number formed is $3048$
(i) and (iii) are INCORRECT
Answer : A