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All questions of Knowing Our Numbers for Class 6 Exam

The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
  • a)
    10
  • b)
    100
  • c)
    504
  • d)
    2520
Correct answer is option 'D'. Can you explain this answer?

Varun Kapoor answered
We have to find the least number that is divisible by all numbers from 1 to 10.
∴ LCM (1 to 10) = 23 × 32 × 5 × 7
= 2520
Thus, 2520 is the least number that is divisible by every element and is equal to the least common multiple.
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Can you explain the answer of this question below:
When one is added to the greatest four-digit number what is the result?
  • A:
    smallest 4-digit number
  • B:
    smallest 5-digit number
  • C:
    greatest 5-digit number
  • D:
    greatest 4-digit number
The answer is B.

Jhanvi Banerjee answered
 Smallest five digit number
Step-by-step explanation:
the greatest four digit number is 9,999
so, 9,999 + 1 = 10,000
therefore,  the number obtained is the smallest 5 digit number

When 1 is added to the greatest 3-digit number, what is the result?
  • a)
    Smallest 3-digit number
  • b)
    Greatest 4-digit number
  • c)
    Greatest 3-digit number
  • d)
    Smallest 4-digit number
Correct answer is option 'D'. Can you explain this answer?

Geetika Shah answered
  • We know that the greatest 3-digit number is 999.
  • When one is added to the  greatest 3-digit number we get the smallest 4-digit number i.e.,
    ► 999 + 1 = 1000
  • So option D is the correct answer. 

When one is added to the greatest 2-digit number what is the result?
  • a)
    smallest 3-digit number
  • b)
    smallest 2-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 3-digit number
Correct answer is 'A'. Can you explain this answer?

Ankita Saha answered
We know that the greatest 2 digit number is 99.
When one is added to greatest 2 digit number i.e, 99 + 1 = 100 
we get smallest 3 digit number.
So option A is the correct answer. 

What will be the correct ascending order of 847, 9754, 8320, 571 ?
  • a)
    9754, 847, 8320, 571
  • b)
    571, 847, 8320, 9754
  • c)
    571, 8320, 847, 9754
  • d)
    9754, 8320, 847, 571
Correct answer is option 'B'. Can you explain this answer?

Anoushka Chavan answered
Ascending Order of Numbers

To answer this question, we need to arrange the given numbers in ascending order, which means from the smallest to the largest number.

Steps to follow:

1. Compare the first two numbers and arrange them in ascending order.

2. Compare the third number with the first two numbers and place it in the correct position.

3. Similarly, compare the fourth number with the three numbers arranged till now and place it in the correct position.

4. Continue this process until all the numbers are arranged in ascending order.

Arranging the given numbers:

Let's follow the above steps to arrange the given numbers in ascending order.

1. Compare 847 and 9754. 847 is smaller than 9754. So, we can write 847 first.

2. Compare 8320 with 847. 8320 is larger than 847. So, we can write it after 847.

3. Compare 571 with the three numbers arranged till now. 571 is smaller than all three numbers. So, we can write it first.

4. Compare 9754 and 8320 with the three numbers arranged till now. 9754 is larger than all three numbers, and 8320 is larger than 571 and 847. So, we can write 8320 after 847 and 9754 after 8320.

Therefore, the correct ascending order of the given numbers is B) 571, 847, 8320, 9754.

When 1 is subtracted from smallest 3-digit number what is the result?
  • a)
    smallest 2-digit number
  • b)
    greatest 3-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 1-digit number
Correct answer is option 'C'. Can you explain this answer?

Rahul Mehra answered
We know , smallest 3 digit number is 100
On subtracting 1 from smallest 3 digit number 
We get , 100 - 1 = 99 which is greatest 2 digit number . 
So option C is the correct answer. 

When 1 is subtracted from smallest 4-digit number what is the result?
  • a)
    greatest 3-digit number
  • b)
    greatest 2-digit number
  • c)
    smallest 2-digit number
  • d)
    greatest 1-digit number
Correct answer is option 'A'. Can you explain this answer?

Ragini jain answered
The smallest 4-digit number is 1000
On subtracting 1 from smallest 4-digit number , we get 1000 - 1 = 999 which is greatest 3 digit number. 
So Option A is the correct answer. 

The smallest 8 digit number is called ______.
  • a)
    Ten lakh
  • b)
    One lakh
  • c)
    Ten crore
  • d)
    One crore
Correct answer is option 'D'. Can you explain this answer?

Gayatri Chavan answered
The largest 7-digit number is 99,99,999. The successor of 99,99,999 = 99,99,999 + 1 = 1,00,00,000. So, 10000000 is the smallest 8-digit number. ... -99999999 is the smallest negative value if (-) is not a digit.

Can you explain the answer of this question below:

Make the greatest four digit number by using any one digit twice by 3, 8, 7?

  • A:

    8378

  • B:

    8873

  • C:

    3387

  • D:

    7783

The answer is b.

Geetika Shah answered
8873  is the correct ✔ answer. Here, we can see the largest no. Is 8 , we have repeated it twice, then 7  then 3 . So, the greatest no. here is 8873.

If we add 1 more to the greatest 6-digit number we get
  • a)
    smallest 6-digit number
  • b)
    smallest 5-digit number
  • c)
    smallest 7-digit number
  • d)
    smallest 4-digit number
Correct answer is option 'C'. Can you explain this answer?

Shivam Saha answered
greatest 6-digit number is 999,999 
On adding 1 to  greatest 6-digit number we get,
999,999 + 1 = 1000000 i.e, smallest 7-digit number.
So option C is the correct answer. 

Make the greatest and the smallest four digit number using any four-digit number with digit 5 always at thousand place.
  • a)
    5999, 5000
  • b)
    5789, 5120
  • c)
    5986, 5012
  • d)
    5987, 5012
Correct answer is 'A'. Can you explain this answer?

Chetan Rian answered
The option (a) is wrong. Because in this question clear write the any four - digit using .So,how the answer is 5999 and 5000.
But
in this answer only two digit is used.

Using digits 0,1,2,3 without repetition make the smallest four digit number?
  • a)
    3201
  • b)
    1023
  • c)
    3210
  • d)
    2310
Correct answer is option 'B'. Can you explain this answer?

Priyanka Sharma answered
1023 is the correct ✔ answer. As  we can see, we cannot put 0 at  the the first place, so the smallest no. Is 1 , then 2 and 3 . So, 1023 is the correct ✔ answer.

Using digits 4, 5, 6 and 0 without repetition make the greatest four digit number?
  • a)
    4650
  • b)
    6540
  • c)
    4560
  • d)
    5640
Correct answer is option 'B'. Can you explain this answer?

Varun Kapoor answered
6540 is the correct ✔ answer.  As, We can see 6 is the largest no. In the given no.'s, then 5 then 4 then 0 . Therefore, 6540 is the correct one.

If we add 1 more to the greatest 4-digit number we get
  • a)
    smallest 5-digit number
  • b)
    smallest 7-digit number
  • c)
    smallest 6-digit number
  • d)
    smallest 8-digit number
Correct answer is option 'A'. Can you explain this answer?

Sushant Kapoor answered
The greatest 4-digit number is 9999 on adding 1 to greatest 4-digit number we get 
9999 + 1 = 10,000 which is smallest 5 digit number.
So option A is the correct answer. 
 

Sum of 178 and 69 to nearest hundred is
  • a)
    100
  • b)
    200
  • c)
    250
  • d)
    300
Correct answer is option 'B'. Can you explain this answer?

Gunjan Lakhani answered
To solve this, let's first find the sum of 178 and 69:
178+69=247
Now, we round 247 to the nearest hundred.
  • The nearest hundred to 247 is 200 because 247 is closer to 200 than to 300.
So, the sum of 178 and 69 rounded to the nearest hundred is 200.
Answer: 2 (200)

Can you explain the answer of this question below:

Correct descending order of 5000, 7500, 85400, 7861 is

  • A:

    85400, 7861, 7500, 5000

  • B:

    85400, 7500, 7861, 5000

  • C:

    7861, 7500, 7861, 5000

  • D:

    5000, 7500, 85400, 7861

The answer is A.

Shruti Mishra answered
Descending order is basically greatest to smallest. The given numbers, 85400 is the greatest, then comes 7861, then 7500 and last, 5000. 85400, 7861, 7500, 5000 

If we add 1 more to the greatest 5-digit number we get
  • a)
    smallest 5-digit number
  • b)
    smallest 4-digit number
  • c)
    smallest 3-digit number
  • d)
    smallest 6-digit number
Correct answer is option 'D'. Can you explain this answer?

Shalini Chakraborty answered
Greatest 5-digit number is 99999
On adding 1 to greatest 5-digit number we get
99999 + 1 = 10,0000 which is smallest 6 digit number . 
S option D is the correct answer. 

Can you explain the answer of this question below:

Make the greatest four digit number by using any one digit twice by 0, 4, 9?

  • A:

    9404

  • B:

    9440

  • C:

    9940

  • D:

    9400

The answer is C.

Amit Sharma answered
9940 is the correct✔ answer. Here, the largest no. Is 9 , we repeated it twice, then 4 , then 0 . So, 9940 is the correct one.

If we add 1 more to the greatest 3-digit number we get
  • a)
    smallest 4-digit number
  • b)
    smallest 7-digit number
  • c)
    smallest 5-digit number
  • d)
    smallest 6-digit number
Correct answer is option 'A'. Can you explain this answer?

Tavishi Shah answered
As the greatest 3-digit number is 999
So on adding 1 to  greatest 3-digit number 
We get , 999 + 1 = 1000 which is smallest 4 digit number . 
So option A is the correct answer. 

When one is added to the greatest 2-digit number what is the result?
  • a)
    smallest 3-digit number
  • b)
    smallest 2-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 3-digit number
Correct answer is option 'A'. Can you explain this answer?

Rithika Patel answered
We know that the greatest 2 digit number is 99.
When one is added to greatest 2 digit number i.e, 99 + 1 = 100 
we get smallest 3 digit number.
So option A is the correct answer. 

Make the greatest four digit number by using any one digit twice by 0, 4, 9?
  • a)
    9404
  • b)
    9440
  • c)
    9940
  • d)
    9400
Correct answer is 'C'. Can you explain this answer?

Lavanya Menon answered
9940 is the correct✔ answer. Here, the largest no. Is 9 , we repeated it twice, then 4 , then 0 . So, 9940 is the correct one.

Estimated value of 467 to nearest thousand is
  • a)
    Zero
  • b)
    400
  • c)
    470
  • d)
    1000
Correct answer is option 'A'. Can you explain this answer?

Eduskill Classes answered
The estimated value of 467 to the nearest thousand is zero because:
  • When rounding to the nearest thousand, any number below 500 is rounded down.
  • Since 467 is less than 500, it is rounded down to zero.

What is the Roman numeral for 50?
  • a)
    L
  • b)
    X
  • c)
    C
  • d)
    D
Correct answer is option 'A'. Can you explain this answer?

Rounak Patel answered
Roman Numeral for 50
• The Roman numeral for 50 is represented by the letter "L".
• In Roman numerals, "L" stands for 50.
• The Roman numeral system uses letters to represent numbers, with "L" representing 50 in this case.
• It is important to understand the basic Roman numeral symbols to recognize and interpret numbers written in this ancient numeral system.
• Therefore, when you see the Roman numeral "L", you can identify it as representing the number 50.

What is the even prime number?
  • a)
    3
  • b)
    2
  • c)
    1
  • d)
    None of the above
Correct answer is option 'B'. Can you explain this answer?

EduRev Class 6 answered
The only even prime number is 2. This is because a prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. While all other even numbers can be divided by 2, making them not prime, 2 can only be divided by 1 and 2, making it the only even prime number.

Correct descending order of 5000, 7500, 85400, 7861 is
  • a)
    85400, 7861, 7500, 5000
  • b)
    85400, 7500, 7861, 5000
  • c)
    7861, 7500, 7861, 5000
  • d)
    5000, 7500, 85400, 7861
Correct answer is 'A'. Can you explain this answer?

Moumita Roy answered
Descending order is basically greatest to smallest. The given numbers, 85400 is the greatest, then comes 7861, then 7500 and last, 5000. 85400, 7861, 7500, 5000 

The smallest 5-digit number is bigger than the largest 4-digit number by _______.
  • a)
    999
  • b)
    998
  • c)
    1000
  • d)
    1
Correct answer is option 'D'. Can you explain this answer?

Sankar Saha answered
Understanding 5-digit and 4-digit Numbers
To determine the difference between the smallest 5-digit number and the largest 4-digit number, we need to identify these two numbers first.
Smallest 5-Digit Number
- The smallest 5-digit number is 10000.
- This is the first number that contains five digits.
Largest 4-Digit Number
- The largest 4-digit number is 9999.
- This is the last number that has four digits.
Calculating the Difference
Now, we can calculate the difference between these two numbers:
- Difference = Smallest 5-digit number - Largest 4-digit number
- Difference = 10000 - 9999
Result of the Calculation
- When we perform the subtraction, we find:
10000 - 9999 = 1
Conclusion
The smallest 5-digit number (10000) is bigger than the largest 4-digit number (9999) by exactly 1. Therefore, the correct answer is option D.
This simple calculation highlights the relationship between 4-digit and 5-digit numbers, showing how they increment in value.

The smallest natural number which when rounded off to the nearest hundreds as 500 is
  • a)
    499
  • b)
    501
  • c)
    450
  • d)
    549
Correct answer is option 'C'. Can you explain this answer?

Saras Yadav King answered
Understanding Rounding Off to the Nearest Hundreds Rounding off numbers helps simplify them, especially when estimating. When rounding to the nearest hundreds, we follow specific rules: Rounding Rules - If the last two digits are 50 or more, round up. - If the last two digits are less than 50, round down. Finding the Range for 500 To round to 500, we need to determine the range of numbers that will yield 500 when rounded. - The numbers that round to 500 must be between 450 and 549, inclusive. - Minimum limit: 450 rounds up to 500. - Maximum limit: 549 rounds down to 500. Evaluating the Options Now, let's analyze the provided options based on the rounding rules: - Option a) 499 - Last two digits are 99, which is greater than 50. - Rounds up to 500. - Option b) 501 - Last two digits are 01, which is less than 50. - Rounds down to 500. - Option c) 450 - Last two digits are 50, which equals 50. - Rounds up to 500. - Option d) 549 - Last two digits are 49, which is less than 50. - Rounds down to 500. Conclusion Among the options, 450 is the smallest natural number that rounds to 500 when rounded to the nearest hundred. Therefore, the correct answer is option c


t
o find the smallest natural number that rounds off to 500 when rounded to the nearest hundred, consider the range of numbers that round to 500. Numbers from 450 to 549 round off to 500 when rounded to the nearest hundred. Therefore, the smallest number that rounds to 500 is 450. So, the correct answer is C: 450.


1 billion = ______ million
  • a)
    10
  • b)
    100
  • c)
    1000
  • d)
    10000
Correct answer is option 'C'. Can you explain this answer?

Gunjan Lakhani answered
One billion is equal to 1000 million. This is because when we multiply 1000 by 1000, we get 1 million. Therefore, if we multiply 1000 million by 1000, we get 1 billion.

Rita has a ribbon of length 2070 mm. Sita has a ribbon whose length is 1232 mm shorter than Rita's ribbon. What is the approximate length of Sita's ribbon when rounded to the nearest hundred (in millimeters)?
  • a)
    500
  • b)
    1000
  • c)
    800
  • d)
    2000
Correct answer is option 'C'. Can you explain this answer?

Subset Academy answered
To find the approximate length of Sita's ribbon, we need to subtract 1232 mm from Rita's ribbon length and then round the result to the nearest hundred.
Rita's ribbon length = 2070 mm Sita's ribbon length = Rita's ribbon length - 1232 mm
Sita's ribbon length ≈ 2070 mm - 1232 mm Sita's ribbon length ≈ 838 mm
When rounded to the nearest hundred, Sita's ribbon length is approximately 800 mm.

Roman Numeral of 400 is
  • a)
    CD
  • b)
    CL
  • c)
    LD
  • d)
    XC
Correct answer is option 'A'. Can you explain this answer?

Abhay Datta answered
Understanding Roman Numerals
Roman numerals are a numeric system that originated in ancient Rome, using combinations of letters from the Latin alphabet to represent numbers. Each letter has a specific value, which is added or subtracted based on its placement in relation to other letters.
Values of Key Roman Numerals
- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000
Breaking Down 400 in Roman Numerals
To represent the number 400 in Roman numerals, we need to consider how the values combine:
- The letter "C" stands for 100.
- Therefore, "CD" represents 400, which is achieved by subtracting 100 (C) from 500 (D).
Why Not the Other Options?
- CL (150): This represents 100 + 50, which equals 150.
- LD (Not Valid): There’s no valid Roman numeral for 450; "L" (50) cannot precede "D" (500) in this way.
- XC (90): This signifies 100 - 10, which equals 90, not relevant to 400.
Conclusion
The correct Roman numeral for 400 is "CD", making option A the correct answer. Understanding the principles of addition and subtraction in Roman numerals is crucial for interpreting and writing these numbers accurately.

What is the value of the Roman numeral XXIV?
  • a)
    14
  • b)
    24
  • c)
    34
  • d)
    44
Correct answer is option 'B'. Can you explain this answer?

Arjun Yadav answered
Value of Roman Numeral XXIV
Roman numerals are a system of numerical notations used in ancient Rome. Each letter represents a different value. In this case, XXIV is a Roman numeral that represents the number 24.

Explanation
- The Roman numeral XX represents 20 (X=10, so XX=10+10=20)
- The Roman numeral IV represents 4 (I=1, V=5, so IV=5-1=4)
- When we combine XX and IV, we get 20 + 4 = 24
- Therefore, the value of the Roman numeral XXIV is 24.

Conclusion
In conclusion, the Roman numeral XXIV represents the number 24 in the decimal system. It is important to understand the value of each Roman numeral letter to correctly interpret and convert Roman numerals into regular numbers.

When one is added to the greatest four-digit number what is the result?
  • a)
    smallest 4-digit number
  • b)
    smallest 5-digit number
  • c)
    greatest 5-digit number
  • d)
    greatest 4-digit number
Correct answer is 'B'. Can you explain this answer?

Deepika Basu answered
 Smallest five digit number
Step-by-step explanation:
the greatest four digit number is 9,999
so, 9,999 + 1 = 10,000
therefore,  the number obtained is the smallest 5 digit number

The tickets sold for the semi-final IPL match were 9872, whereas 10050 tickets were sold during the finals. How many more tickets, estimated to the nearest tens, were sold during the finals?
  • a)
    160
  • b)
    170
  • c)
    180
  • d)
    190
Correct answer is option 'C'. Can you explain this answer?

Vp Classes answered
During the finals, 10050 tickets were sold, whereas for the semi-final match, only 9872 tickets were sold. To find out how many more tickets were sold during the finals, we subtract the number of tickets sold for the semi-finals from the number of tickets sold during the finals. Therefore, 10050 - 9872 = 178. Since we need to estimate to the nearest tens, the answer would be 180.

Chapter doubts & questions for Knowing Our Numbers - Online MCQ Tests for Class 6 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.

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