## COMPUTATION OF WHOLE NUMBERS MCQs

### Whole Numbers

Total Questions : 46 | Page 4 of 5 pages
Question 31. Two friends lived on a number line. One of them lived at number 2 and other at number 7. Then the distance between them is ___ units.
1.    5
2.    4
3.    3
4.    9

The distance between any two consecutive numbers is 1 unit. So the distance between number 2 and 7 is 5 units.

Question 32. In a hypothetical universe, all the numbers are represented using dots. Each number is represented by that many dots as the value of the number. These dots are then joined by a straight line. The number 2 when represented in this world, would only form a ___.
1.    Line Segment
2.    Rectangle
3.    Triangle
4.    Point
Answer: Option A. -> Line Segment

In this hypothetical universe, each number is represented by dots such that the number of dots in that universe corresponds to the value of the number it represents in this universe.
Hence, to represent two, we use two dots. When we join two dots by a straight line, we get a line segment and nothing else, as shown.

Question 33. Which of the following numbers will represent a set of square numbers?
1.    4, 9, 16
2.    1, 2, 3
3.    5, 7, 8
4.    9, 11, 12
Answer: Option A. -> 4, 9, 16

Numbers 4, 9, 16 can form squares as they are perfect squares of 2, 3 and 4 respectively.

Question 34. 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

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 35. When we add any two natural numbers, the answer is always a _____.
1.    Whole Number
2.    Negative Natural Number
3.    Zero
4.    Natural Number
Answer: Option D. -> Natural Number

When we add any two natural numbers, the answer is always a natural number.
For example: Take any two natural numbers say 5 and 7. Add them 5 + 7 = 12, 12 is also a natural number.

Question 36. All natural numbers are whole numbers.
1.    True
2.    False

All natural numbers are whole numbers. When zero is included in the list of natural numbers it becomes a set ofwhole numbers.

Question 37. 49 dots can be arranged to form a square. Is it true or false?
1.    True
2.    False

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 38. The predecessor of any number can be obtained by __ one from it.
1.    subtracting
3.    multiplying
4.    dividing

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 39. 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

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 40. Rahul says to Shyam that any number divided by zero is undefined. Is the statement given by Rahul is correct?
1.    True
2.    False