## COMPUTATION OF WHOLE NUMBERS MCQs

### Whole Numbers

Total Questions : 46 | Page 2 of 5 pages
Question 11. If  I want to reach number 7 on the number line from number 1, then how many steps do I need to move considering each 1 unit as 1 step.
1.    5
2.    4
3.    6
4.    7
:
C
The distance between any two consecutive numbers is 1 unit. So the distance between number 1 and 7 is 6 units.
We can write it as = 7 - (+1)
= 6
So, Ineed to move 6 steps to reach number 7 from number 1.
Question 12. All natural numbers are whole numbers.
1.    True
2.    False
:
A
All natural numbers are whole numbers. When zero is included in the list of natural numbers it becomes a set ofwhole numbers.
Question 13. 49 dots can be arranged to form a square. Is it true or false?
1.    True
2.    False
:
A
If 7 dots are arranged horizontally and vertically, we will get square.

If any number is a perfect square then we can form a square with that number.
Question 14. The predecessor of any number can be obtained by __ one from it.
1.    subtracting
3.    multiplying
4.    dividing
:
A
The predecessor of any number is the number that comes immediately before that number. The predecessor of any number can be obtained by subtracting one from it.
Question 15. Which of the following statements are correct?
i) 0 + 2 is a whole number.
ii) 0 ÷ 49843 is a not a whole number.
iii)  98645 × 5678 = 5678 × 98645
1.    i, ii and iii
2.    i only
3.    i and iii only
4.    ii only
Answer: Option C. -> i and iii only
:
C
i)0 + 2 = 2 which is a whole number. Also, whole numbers are closed under addition.
ii)0 ÷ 49843 = 0 which is a whole number.
iii)98645 × 5678 = 5678 × 98645
This represents commutative property of multiplication.
Question 16. Rahul says to Shyam that any number divided by zero is undefined. Is the statement given by Rahul is correct?
1.    True
2.    False
:
A
If you divide something by 2 you divide that thing into 2 parts. If you divide something by 4 you divide that thing into 4 parts. Now if you divide something by 0, you cannot divide that thing into 0 parts. So a division by 0 is undefined and Rahulis correct.
Question 17. 117 + 9 = 117 + 10 - 1 = 127 - 1
Is the above expression is correct?
1.    True
2.    False
:
A
Yes it is correct.
9 can be written as 10 - 1
So 117 + 9 = 117 + 10 - 1
Again (117+ 10) = 127, so (117+ 10) - 1= 127 - 1
Question 18. The set of counting numbers starting with 1 and continuing 2,3,4.....and so on are called _____.
1.    Natural Numbers
2.    Whole Numbers
3.    Integers
4.    Composite Numbers
Answer: Option A. -> Natural Numbers
:
A
The set of counting numbers starting with 1 and continuing 2,3,4.....and so on arecalled Natural Numbers.
Question 19. How many whole numbers are there between 9876 and 9900?
1.    24
2.    25
3.    23
4.    26
:
C
The number of whole numbers between any two numbers
= (thedifference between the numbers) -1.
The difference between 9900 - 9876 is 24 and 24 -1 = 23.

So, there are 23 whole numbers are there between 9876 and 9900.
Question 20. A cat is at number 3. A rat is at number 10. Assuming both are standing on a number line, how far is the rat from the cat?
1.    5
2.    4
3.    3
4.    7