Tag: knowing our numbers

Questions Related to knowing our numbers

Which of the following are meaningless?

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

  1. VX

  2. IXIV

  3. XIIV

  4. All the above

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Correct Option: D
Explanation:

VX(incorrect) = 5 = V

IXIV(incorrect) = 13 = XIII

XIIV(incorrect) = 13 = XIII

So, given options A, B and C are meaningless

The symbol that can never be repeated is  

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

  1. I

  2. V

  3. X

  4. M

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Correct Option: B
Explanation:

The double of $V (5)$ in Roman numerals will be $X (10)$

So only $V$ is the symbol that cannot be repeated.

The product obtained when $13$ is multiplied by $7$(in roman number ) is 

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

  1. XXCI

  2. LXI

  3. XCI

  4. CI

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Correct Option: C
Explanation:
 $13\times 7=91$
Break the number $91$ (decompose it) into place value subgroups: 
$91 = 90 + 1;$

Convert each subgroup: $90 = 100 - 10 => C - X = XC; 1 = I;$

Wrap up the Roman numeral: 
$91 = 90 + 1 = XC + I = XCI;$
$ XCI$ is a group of numerals in additive and subtractive notation which will be $91.$

So option C is the correct answer.

Compare $XXII$ __ $12$ (using $>, <, =$)

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

  1. $>$

  2. $<$

  3. $=$

  4. none

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Correct Option: A
Explanation:

WE know, $XXII$ stands for $22$ in Roman numerals.

$22$ is greater than $12$ 
So $XXII>12$

So option A is the correct answer.

MMM stands for ____________.

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

  1. $3000$

  2. $100$

  3. $300$

  4. $1000$

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Correct Option: A
Explanation:

M  stands for thousand in roman numerals

$\therefore$ MMM= 3000

XC is same as __________.

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

  1. 100 - 10

  2. 100 + 10

  3. 100 - 50

  4. 100 - 9

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Correct Option: A
Explanation:

We know that

$X=10, C=100$

Therefore,
$XC=100-10$

Hence, this is the answer.

Roman numeral for the greatest three digit number is

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

  1. IXIXIX

  2. CMIXIX

  3. CMXCIX

  4. CMIIC

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Correct Option: C
Explanation:

CMXCIX = (1000 - 100) + (100 - 10)+ (10 - 1)
= 900 + 90 + 9 = 999

Sum of 10 and 40 in roman number is

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

  1. C

  2. V

  3. L

  4. D

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Correct Option: C
Explanation:

The sum of 10 and 40 is,

10+40=50
50 is written as the symbol L in Roman numerals.
So 50=L
Option C is the correct answer.

IX + XV + XX = ______

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

  1. 45

  2. 35

  3. 44

  4. 40

Show answer
Correct Option: C
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.

 

9 + 15 + 20 = 44

The Roman numeral for the greatest single digit number is

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

  1. XI

  2. IC

  3. IX

  4. ID

Show answer
Correct Option: C
Explanation:

Greatest single digit number is 9.

IX = 9