Operations on Whole Numbers - Objective Type Questions Class 6 Notes | EduRev

Mathematics (Maths) Class 6

Class 6 : Operations on Whole Numbers - Objective Type Questions Class 6 Notes | EduRev

 Page 1


 
 
 
 
 
 
Objective Type Questions                                                    PAGE: 4.24 
Mark the correct alternative in each of the following: 
 
1. Which one of the following is the smallest whole number? 
(a) 1                     (b) 2                         (c) 0                                     (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the set of whole numbers is {0, 1, 2, 3, 4 ...}.  
Hence, the smallest whole number is 0. 
 
2. Which one of the following is the smallest even whole number? 
(a) 0                               (b) 1                                   (c) 2                                      (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the number which is divisible by 2 is an even number and 2 is the smallest even number. 
 
3. Which one of the following is the smallest odd whole number? 
(a) 0                               (b) 1                                   (c) 3                                      (d) 5 
Solution: 
 
The option (b) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the natural number which is not divisible by 2 is called an odd whole number and 1 is the smallest odd whole 
number. 
 
4. How many whole numbers are between 437 and 487? 
(a) 50                               (b) 49                                   (c) 51                                      (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the whole numbers between 437 and 487 are 438, 439, 440, 441, ..., 484, 485 and 486. 
In order to find the required number of whole numbers subtract 437 from 487 and then subtract again 1. 
Hence, there are (487 - 437) - 1 whole numbers lying between 437 and 487.  
So we get (487 - 437) - 1 = 50 - 1 = 49 
 
5. The product of the successor of 999 and the predecessor of 1001 is 
(a) one lakh                            (b) one billion                               (c) one million                                (d) one crore 
Solution: 
 
The option (c) is correct answer. 
We know that the successor of 999 = 999 + 1 = 1000 
So the predecessor of 1001 = 1001 - 1 = 1000 
It can be written as 
Product of them = (Successor of 999) × (Predecessor of 1001) 
Page 2


 
 
 
 
 
 
Objective Type Questions                                                    PAGE: 4.24 
Mark the correct alternative in each of the following: 
 
1. Which one of the following is the smallest whole number? 
(a) 1                     (b) 2                         (c) 0                                     (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the set of whole numbers is {0, 1, 2, 3, 4 ...}.  
Hence, the smallest whole number is 0. 
 
2. Which one of the following is the smallest even whole number? 
(a) 0                               (b) 1                                   (c) 2                                      (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the number which is divisible by 2 is an even number and 2 is the smallest even number. 
 
3. Which one of the following is the smallest odd whole number? 
(a) 0                               (b) 1                                   (c) 3                                      (d) 5 
Solution: 
 
The option (b) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the natural number which is not divisible by 2 is called an odd whole number and 1 is the smallest odd whole 
number. 
 
4. How many whole numbers are between 437 and 487? 
(a) 50                               (b) 49                                   (c) 51                                      (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the whole numbers between 437 and 487 are 438, 439, 440, 441, ..., 484, 485 and 486. 
In order to find the required number of whole numbers subtract 437 from 487 and then subtract again 1. 
Hence, there are (487 - 437) - 1 whole numbers lying between 437 and 487.  
So we get (487 - 437) - 1 = 50 - 1 = 49 
 
5. The product of the successor of 999 and the predecessor of 1001 is 
(a) one lakh                            (b) one billion                               (c) one million                                (d) one crore 
Solution: 
 
The option (c) is correct answer. 
We know that the successor of 999 = 999 + 1 = 1000 
So the predecessor of 1001 = 1001 - 1 = 1000 
It can be written as 
Product of them = (Successor of 999) × (Predecessor of 1001) 
 
 
 
 
 
 
By substituting the values 
 Product of them = 1000 × 1000 = 1000000 = one million 
 
6. Which one of the following whole numbers does not have a predecessor? 
(a) 1                            (b) 0                              (c) 2                               (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
Hence, the smallest whole number is 0 which does not have a predecessor. 
 
7. The number of whole numbers between the smallest whole number and the greatest 2-digit number is 
(a) 101                            (b) 100                              (c) 99                               (d) 98 
Solution: 
 
The option (d) is correct answer. 
We know that the smallest whole number = 0 
So the greatest 2 digit whole number = 99 
Whole numbers which lie between 0 and 99 are 1, 2, 3, 4,..., 97, 98. 
In order to find the number of whole numbers between 0 and 99, first subtract 1 from the difference of 0 and 
99. 
So the number of whole numbers between 0 and 99 = (99 - 0) - 1 = 99 - 1 = 98 
 
8. If n is a whole number such that n + n = n, then n =? 
(a) 1                            (b) 2                              (c) 3                               (d) None of these 
Solution: 
 
The option (d) is correct answer. 
We know that 0 + 0 = 0, 1 + 1 = 2, 2 + 2 = 4.... 
Hence, the statement n + n = n is true only when n = 0. 
 
9. The predecessor of the smallest 3-digit number is 
(a) 999                            (b) 99                              (c) 100                               (d) 101 
Solution: 
 
The option (b) is correct answer. 
We know that the smallest 3 digit number = 100 
So the predecessor of 3 digit number = 100 - 1 = 99 
 
10. The least number of 4-digits which is exactly divisible by 9 is 
(a) 1008                            (b) 1009                              (c) 1026                               (d) 1018 
Solution: 
 
The option (a) is correct answer. 
We know that the least 4-digit number = 1000 
Hence, the least 4-digits which is exactly divisible by 9 is 1000 + (9 - 1) = 1008 
 
11. The number which when divided by 53 gives 8 as quotient and 5 as remainder is 
(a) 424                 (b) 419                       (c) 429                              (d) None of these 
Solution: 
Page 3


 
 
 
 
 
 
Objective Type Questions                                                    PAGE: 4.24 
Mark the correct alternative in each of the following: 
 
1. Which one of the following is the smallest whole number? 
(a) 1                     (b) 2                         (c) 0                                     (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the set of whole numbers is {0, 1, 2, 3, 4 ...}.  
Hence, the smallest whole number is 0. 
 
2. Which one of the following is the smallest even whole number? 
(a) 0                               (b) 1                                   (c) 2                                      (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the number which is divisible by 2 is an even number and 2 is the smallest even number. 
 
3. Which one of the following is the smallest odd whole number? 
(a) 0                               (b) 1                                   (c) 3                                      (d) 5 
Solution: 
 
The option (b) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the natural number which is not divisible by 2 is called an odd whole number and 1 is the smallest odd whole 
number. 
 
4. How many whole numbers are between 437 and 487? 
(a) 50                               (b) 49                                   (c) 51                                      (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the whole numbers between 437 and 487 are 438, 439, 440, 441, ..., 484, 485 and 486. 
In order to find the required number of whole numbers subtract 437 from 487 and then subtract again 1. 
Hence, there are (487 - 437) - 1 whole numbers lying between 437 and 487.  
So we get (487 - 437) - 1 = 50 - 1 = 49 
 
5. The product of the successor of 999 and the predecessor of 1001 is 
(a) one lakh                            (b) one billion                               (c) one million                                (d) one crore 
Solution: 
 
The option (c) is correct answer. 
We know that the successor of 999 = 999 + 1 = 1000 
So the predecessor of 1001 = 1001 - 1 = 1000 
It can be written as 
Product of them = (Successor of 999) × (Predecessor of 1001) 
 
 
 
 
 
 
By substituting the values 
 Product of them = 1000 × 1000 = 1000000 = one million 
 
6. Which one of the following whole numbers does not have a predecessor? 
(a) 1                            (b) 0                              (c) 2                               (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
Hence, the smallest whole number is 0 which does not have a predecessor. 
 
7. The number of whole numbers between the smallest whole number and the greatest 2-digit number is 
(a) 101                            (b) 100                              (c) 99                               (d) 98 
Solution: 
 
The option (d) is correct answer. 
We know that the smallest whole number = 0 
So the greatest 2 digit whole number = 99 
Whole numbers which lie between 0 and 99 are 1, 2, 3, 4,..., 97, 98. 
In order to find the number of whole numbers between 0 and 99, first subtract 1 from the difference of 0 and 
99. 
So the number of whole numbers between 0 and 99 = (99 - 0) - 1 = 99 - 1 = 98 
 
8. If n is a whole number such that n + n = n, then n =? 
(a) 1                            (b) 2                              (c) 3                               (d) None of these 
Solution: 
 
The option (d) is correct answer. 
We know that 0 + 0 = 0, 1 + 1 = 2, 2 + 2 = 4.... 
Hence, the statement n + n = n is true only when n = 0. 
 
9. The predecessor of the smallest 3-digit number is 
(a) 999                            (b) 99                              (c) 100                               (d) 101 
Solution: 
 
The option (b) is correct answer. 
We know that the smallest 3 digit number = 100 
So the predecessor of 3 digit number = 100 - 1 = 99 
 
10. The least number of 4-digits which is exactly divisible by 9 is 
(a) 1008                            (b) 1009                              (c) 1026                               (d) 1018 
Solution: 
 
The option (a) is correct answer. 
We know that the least 4-digit number = 1000 
Hence, the least 4-digits which is exactly divisible by 9 is 1000 + (9 - 1) = 1008 
 
11. The number which when divided by 53 gives 8 as quotient and 5 as remainder is 
(a) 424                 (b) 419                       (c) 429                              (d) None of these 
Solution: 
 
 
 
 
 
 
The option (c) is correct answer. 
It is given that 
Divisor = 53, Quotient = 8 and Remainder = 5. 
By using the relation we get 
Dividend = Divisor × Quotient + Remainder  
By substituting the values 
Dividend = 53 × 8 + 5 = 424 + 5 =429 
Hence, the required number is 429. 
 
12. The whole number n satisfying n + 35 = 101 is 
(a) 65                 (b) 67                       (c) 64                              (d) 66 
Solution: 
 
The option (d) is correct answer. 
It is given that  
n + 35 = 101 
By adding - 35 on both sides  
n + 35 + (- 35) = 101 + (- 35) 
On further calculation 
n + 0 = 66 
So we get 
n = 66 
 
13. The 4 × 378 × 25 is 
(a) 37800                 (b) 3780                       (c) 9450                              (d) 30078 
Solution: 
 
The option (a) is correct answer. 
We can write it as 
4 × 378 × 25 = 4 × 25 × 378  
On further calculation 
4 × 378 × 25 = 100 × 378 = 37800 
 
14. The value of 1735 × 1232 - 1735 × 232 is 
(a) 17350                 (b) 173500                       (c) 1735000                              (d) 173505 
Solution: 
 
The option (c) is correct answer. 
By using the distributive law of multiplication over subtraction 
1735 × 1232 - 1735 × 232 = 1735(1232 - 232) 
On further calculation 
1735 × 1232 - 1735 × 232 = 1735 × 1000 = 1735000 
 
15. The value of 47 × 99 is 
(a) 4635                 (b) 4653                       (c) 4563                              (d) 6453 
Solution: 
 
The option (b) is correct answer. 
It can be written as 
99 = 100 - 1 
Page 4


 
 
 
 
 
 
Objective Type Questions                                                    PAGE: 4.24 
Mark the correct alternative in each of the following: 
 
1. Which one of the following is the smallest whole number? 
(a) 1                     (b) 2                         (c) 0                                     (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the set of whole numbers is {0, 1, 2, 3, 4 ...}.  
Hence, the smallest whole number is 0. 
 
2. Which one of the following is the smallest even whole number? 
(a) 0                               (b) 1                                   (c) 2                                      (d) None of these 
Solution: 
 
The option (c) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the number which is divisible by 2 is an even number and 2 is the smallest even number. 
 
3. Which one of the following is the smallest odd whole number? 
(a) 0                               (b) 1                                   (c) 3                                      (d) 5 
Solution: 
 
The option (b) is correct answer. 
We know that the natural numbers along with 0 form the collection of whole numbers.  
Hence, the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
So the natural number which is not divisible by 2 is called an odd whole number and 1 is the smallest odd whole 
number. 
 
4. How many whole numbers are between 437 and 487? 
(a) 50                               (b) 49                                   (c) 51                                      (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the whole numbers between 437 and 487 are 438, 439, 440, 441, ..., 484, 485 and 486. 
In order to find the required number of whole numbers subtract 437 from 487 and then subtract again 1. 
Hence, there are (487 - 437) - 1 whole numbers lying between 437 and 487.  
So we get (487 - 437) - 1 = 50 - 1 = 49 
 
5. The product of the successor of 999 and the predecessor of 1001 is 
(a) one lakh                            (b) one billion                               (c) one million                                (d) one crore 
Solution: 
 
The option (c) is correct answer. 
We know that the successor of 999 = 999 + 1 = 1000 
So the predecessor of 1001 = 1001 - 1 = 1000 
It can be written as 
Product of them = (Successor of 999) × (Predecessor of 1001) 
 
 
 
 
 
 
By substituting the values 
 Product of them = 1000 × 1000 = 1000000 = one million 
 
6. Which one of the following whole numbers does not have a predecessor? 
(a) 1                            (b) 0                              (c) 2                               (d) None of these 
Solution: 
 
The option (b) is correct answer. 
We know that the numbers 0, 1, 2, 3, 4 ... form the collection of whole numbers.  
Hence, the smallest whole number is 0 which does not have a predecessor. 
 
7. The number of whole numbers between the smallest whole number and the greatest 2-digit number is 
(a) 101                            (b) 100                              (c) 99                               (d) 98 
Solution: 
 
The option (d) is correct answer. 
We know that the smallest whole number = 0 
So the greatest 2 digit whole number = 99 
Whole numbers which lie between 0 and 99 are 1, 2, 3, 4,..., 97, 98. 
In order to find the number of whole numbers between 0 and 99, first subtract 1 from the difference of 0 and 
99. 
So the number of whole numbers between 0 and 99 = (99 - 0) - 1 = 99 - 1 = 98 
 
8. If n is a whole number such that n + n = n, then n =? 
(a) 1                            (b) 2                              (c) 3                               (d) None of these 
Solution: 
 
The option (d) is correct answer. 
We know that 0 + 0 = 0, 1 + 1 = 2, 2 + 2 = 4.... 
Hence, the statement n + n = n is true only when n = 0. 
 
9. The predecessor of the smallest 3-digit number is 
(a) 999                            (b) 99                              (c) 100                               (d) 101 
Solution: 
 
The option (b) is correct answer. 
We know that the smallest 3 digit number = 100 
So the predecessor of 3 digit number = 100 - 1 = 99 
 
10. The least number of 4-digits which is exactly divisible by 9 is 
(a) 1008                            (b) 1009                              (c) 1026                               (d) 1018 
Solution: 
 
The option (a) is correct answer. 
We know that the least 4-digit number = 1000 
Hence, the least 4-digits which is exactly divisible by 9 is 1000 + (9 - 1) = 1008 
 
11. The number which when divided by 53 gives 8 as quotient and 5 as remainder is 
(a) 424                 (b) 419                       (c) 429                              (d) None of these 
Solution: 
 
 
 
 
 
 
The option (c) is correct answer. 
It is given that 
Divisor = 53, Quotient = 8 and Remainder = 5. 
By using the relation we get 
Dividend = Divisor × Quotient + Remainder  
By substituting the values 
Dividend = 53 × 8 + 5 = 424 + 5 =429 
Hence, the required number is 429. 
 
12. The whole number n satisfying n + 35 = 101 is 
(a) 65                 (b) 67                       (c) 64                              (d) 66 
Solution: 
 
The option (d) is correct answer. 
It is given that  
n + 35 = 101 
By adding - 35 on both sides  
n + 35 + (- 35) = 101 + (- 35) 
On further calculation 
n + 0 = 66 
So we get 
n = 66 
 
13. The 4 × 378 × 25 is 
(a) 37800                 (b) 3780                       (c) 9450                              (d) 30078 
Solution: 
 
The option (a) is correct answer. 
We can write it as 
4 × 378 × 25 = 4 × 25 × 378  
On further calculation 
4 × 378 × 25 = 100 × 378 = 37800 
 
14. The value of 1735 × 1232 - 1735 × 232 is 
(a) 17350                 (b) 173500                       (c) 1735000                              (d) 173505 
Solution: 
 
The option (c) is correct answer. 
By using the distributive law of multiplication over subtraction 
1735 × 1232 - 1735 × 232 = 1735(1232 - 232) 
On further calculation 
1735 × 1232 - 1735 × 232 = 1735 × 1000 = 1735000 
 
15. The value of 47 × 99 is 
(a) 4635                 (b) 4653                       (c) 4563                              (d) 6453 
Solution: 
 
The option (b) is correct answer. 
It can be written as 
99 = 100 - 1 
 
 
 
 
 
 
So we get 
47 × 99 = 47 × (100 - 1)  
On further calculation 
47 × 99 = 47× 100 – 47 = 4700 – 47 = 4653 
Hence, the value of 47 × 99 is 4653. 
 
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