Whole Numbers Test

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Whole Numbers Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following defines commutative law of addition?

A
Zero added to any number is the number itself

B
Addition can be done in any order

C
Odd number added to an odd number equals an even number

D
Addition is inverse of subtraction

Solution

As per commutative law of addition, you can change the position of numbers in an addition expression without changing the sum.

Hence, option (2) is correct. For example, if a and b are any two whole numbers then commutative law of addition gives -
a + b = b + a
Question 2
1 / -0

Every whole number is the predecessor of a/an

A
natural number

B
integer

C
negative number

D
None of these

Solution

Every whole number is the predecessor of a natural number.
We know that whole numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, ....

Natural numbers are 1, 2, 3, 4, 5, 6, 7, 8, .......
The successor of a whole number is the number obtained by adding 1 to it.

We can say that every whole number is the predecessor of a natural number.
Question 3
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Sum of two even numbers will be

A
always odd

B
always even

C
sometimes even

D
sometimes odd

Solution

Sum of two even numbers will be always even.

For example: 2 + 4 = 6
10 + 16 = 26

Similarly, whenever we are going to add two even numbers, we will always get an even number as the answer.
Question 4
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Sarah is preparing some gift boxes for her friends. Each box contains a teddy for Rs. 50, a chocolate for Rs. 20 and a pen for Rs. 30. She makes 8 of these boxes. Find the cost of these 8 boxes.

A
Rs. 800

B
Rs. 500

C
Rs. 100

D
None of these

Solution

Cost of 1 box = (50 + 20 + 30) = Rs. 100
Cost of 8 boxes = (100 × 8) = Rs. 800
So, cost of these 8 boxes = Rs. 800
Question 5
1 / -0

Any number divided by zero is

A
not defined

B
zero

C
the number itself

D
one

Solution

Any number divided by zero is always not defined.
For example:
5 divided by 0 = Infinite
Question 6
1 / -0

Which of the following statements is false?

A
1 x 1 = 1

B
1 - 1 = 1

C
1 + 1 = 2

D
1 ÷ 1 = 1

Solution

1 - 1 = 0 and not 1.
So, 1 - 1 = 1
This statement is false.
Question 7
1 / -0

Whole numbers are closed in

A
multiplication and addition

B
addition and subtraction

C
subtraction and division

D
multiplication and division

Solution

Whole numbers are closed under addition and multiplication. Whole numbers are not closed under subtraction and division.

If a and b are any two whole numbers, then (a + b) and (a x b) are also whole numbers. The sum of two whole numbers is the same, no matter in which order they are added.

So, we can say that whole numbers are closed under addition and subtraction.
Question 8
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Which of the following properties is/are applicable for addition of whole numbers?

A
Closure property

B
Commutative property

C
Property of opposites

D
All of the above

Solution

Closure property, commutative property and property of opposites are the properties of addition of whole numbers.

So, all the given three properties are properties of addition of whole numbers.

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Whole Numbers Test - 5

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Whole Numbers Test - 5

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SHARING IS CARING

Question 1

Zero added to any number is the number itself

Addition can be done in any order

Odd number added to an odd number equals an even number

Addition is inverse of subtraction

Solution

Question 2

natural number

integer

negative number

None of these

Solution

Question 3

always odd

always even

sometimes even

sometimes odd

Solution

Question 4

Rs. 800

Rs. 500

Rs. 100

None of these

Solution

Question 5

not defined

zero

the number itself

one

Solution

Question 6

1 x 1 = 1

1 - 1 = 1

1 + 1 = 2

1 ÷ 1 = 1

Solution

Question 7

multiplication and addition

addition and subtraction

subtraction and division

multiplication and division

Solution

Question 8

Closure property

Commutative property

Property of opposites

All of the above

Solution

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