Free Whole Numbers 01 Practice Test - 6th grade 

Question 1

The successor of a natural number is obtained by adding ___ to it.(answer in numerical value)

SOLUTION

Solution :

If we add one to any natural number we get the immediate successor of that natural number.

Ex: If we add 1 to a given natural number 5 then we get the next natural number i.e. 6.

Question 2

The set of natural numbers along with ____ form collection of whole numbers.

A.

0

B.

1

C.

2

D.

4

SOLUTION

Solution : 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 form the set of whole numbers.

Question 3

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.

A.

5

B.

4

C.

3

D.

9

SOLUTION

Solution : A

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

Question 4

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.

A. 5
B. 4
C. 6
D. 7

SOLUTION

Solution : 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, I need to move 6 steps to reach number 7 from number 1.

Question 5

When we add any two natural numbers, the answer is always a _____.

A.

Whole Number

B.

Negative Natural Number

C.

Zero

D.

Natural Number

SOLUTION

Solution : 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.

Question 6

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 ___.

A. Line Segment
B. Rectangle
C. Triangle
D. Point

SOLUTION

Solution : 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.

                          

Question 7

Which of the following numbers will represent a set of square numbers?

A.

4, 9, 16

B.

1, 2, 3

C.

5, 7, 8

D.

9, 11, 12

SOLUTION

Solution : A



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

Question 8

In the set of the natural numbers, there is a number which does not have its predecessor. What is that number?


__

SOLUTION

Solution :

The natural numbers start with 1. So 1 does not have any predecessor which lie under the natural numbers.

Question 9

In the set of whole numbers, 1 has a predecessor. State True or False?

A.

True

B.

False

SOLUTION

Solution : 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 system of whole numbers.

Question 10

The sum of any two natural numbers will be less than each of the addends individually. State True/False

A.

True

B.

False

SOLUTION

Solution : A

The sum of any two natural numbers is always greater than any of the addends individually.

For example. 4 + 5 = 9,  9 is greater than 4 as well as 5.

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