Computation Of Whole Numbers(Quantitative Aptitude > Number System ) Questions and Answers

Question 1. Six friends went to PVR and the seats were numbered from 1 to 16. If the first person sat on the chair numbered 3 then the sixth person will be sitting on chair numbered _____. Assuming they all sit together.
  1.    9
  2.    8
  3.    7
  4.    6
Explanation:-
Answer: Option B. -> 8
:
B
As the first person is sitting on the chair numbered 3, the sixth person is five places away from the first person.
So, we need to add five places to the chair numbered 3.
∴ Sixth person will sit on the chair numbered 8.
Six Friends Went To PVR And The Seats Were Numbered From 1 T...
Question 2. Ramya wanted to arrange 90 sweets (of dimensions 1×1) in a box. She has 5 boxes of dimensions 10×9, 9×10, 5×18, 16×5 and 18×5. Among these boxes, in which box can she NOT arrange all the  sweets?
  1.    10×9
  2.    16×5
  3.    18×5
  4.    5×18
Explanation:-
Answer: Option B. -> 16×5
:
B
The area occupied byone sweet will be1×1=1 sq units and she has to arrange 90 sweetsin the box.
Minimum space needed by Ramya to arrange all the sweets is 90 sq units.
Except for 16×5 the size of all the boxes is 90 sq units.
16×5=80 sq units so she cannot arrange all the sweetsin this box.
Question 3. In the set of whole numbers, 1 has a predecessor. State True or False?
  1.    True
  2.    False
  3.    5, 7, 8
  4.    9, 11, 12
Explanation:-
Answer: Option A. -> True
:
A
We get the predecessor of any number by reducing 1 from that number. The predecessor of 1 is 0 and 0 lies in the number systemof whole numbers.
Question 4. Product of two whole numbers is always a  ________
  1.    Natural Number
  2.    Whole Number
  3.    Prime Number
  4.    Composite Number
Explanation:-
Answer: Option B. -> Whole Number
:
B
Product of any two whole numbers is always aWhole Number.
For eg: If we multiply two numbers say 5 and 7, 5×7=35, 35 is also a whole number.
Question 5. The sum of any two natural numbers will be less than each of the addends individually. State True/False
  1.    True
  2.    False
  3.    5, 7, 8
  4.    9, 11, 12
Explanation:-
Answer: Option A. -> True
:
A
The sum of any two natural numbers is always greater than any of the addends individually.
For example. 4 + 5 = 9, 9is greater than 4 as well as5.
Question 6. 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
Explanation:-
Answer: Option A. -> 5
:
A
The distance between any two consecutive numbers is 1 unit. So the distance between number 2 and 7 is 5 units.
Question 7. 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
Explanation:-
Answer: Option A. -> Line Segment
:
A
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.
In A Hypothetical Universe, All The Numbers Are Represented ...
Question 8. 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
Explanation:-
Answer: Option A. -> 4, 9, 16
:
A
Which Of The Following Numbers Will Represent A Set Of Squar...
Numbers 4, 9, 16 can form squares as they are perfect squares of 2, 3 and 4 respectively.
Question 9. The set of natural numbers along with ____ form collection of whole numbers.
  1.    zero
  2.    1
  3.    2
  4.    4
Explanation:-
Answer: Option A. -> zero
:
A
Whole numbers start with 0 and continue with counting numbers{1, 2, 3, .....}. Numbers{1, 2, 3, ....} are natural numbers so if we include 0 with natural numbers they formthe setof whole numbers.
Question 10. When we add any two natural numbers, the answer is always a _____.
  1.    Whole Number
  2.    Negative Natural Number
  3.    Zero
  4.    Natural Number
Explanation:-
Answer: Option D. -> Natural Number
:
D
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.
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