Whole Numbers Test

Result

Whole Numbers Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

If $$a$$ and $$b$$ are two whole numbers, then commutative law is applicable to subtraction if and only if ________.

A
$$a = b$$

B
$$a\neq b$$

C
$$a > b$$

D
$$a < b$$

Solution
Question 2
1 / -0

How many whole numbers are there between 25 and 82?

A
56

B
57

C
59

D
58
Question 3
1 / -0

$$8989900$$ is the successor of

A
$$8989899$$

B
$$8989901$$

C
$$8989999$$

D
$$none\ of\ these$$

Solution

$$8989900 - 1 = 8989899$$
Question 4
1 / -0

If $$(31 + 15) + x = 31 + (15 + 23)$$, then by using associativity of addition $$x= $$

A
$$46$$

B
$$38$$

C
$$23$$

D
$$69$$

Solution

Given,
$$(31+15)+x=31+(15+23)$$
or, $$31+(15+x)=31+(15+23)$$ [ Using associativity of addition]
Now comparing both sides we get,
$$15+x=15+23$$
or, $$x=23$$.
Question 5
1 / -0

If $$ x + 12 = 12 + 7$$, then by commutatively of addition, we get$$ x=? $$

A
12

B
7

C
19

D
5

Solution

Given,
$$x + 12 = 12 + 7$$

$$a +b = b + a$$ ....... commutative property of addition

So,
$$x + 12 = 7 + 12$$

On comparing
$$x = 7$$
Question 6
1 / -0

Which one of the following is not a natural number?

A
$$1$$

B
$$10$$

C
$$0$$

D
$$20$$

Solution

The natural numbers are all the integers which are greater than or equal to $$1$$.
Hence, $$0$$ is not a natural number.
Question 7
1 / -0

Mark the correct alternative of the following.
The predecessor of $$1$$ in whole numbers is?

A
$$0$$

B
$$-1$$

C
$$2$$

D
None of these

Solution

The set of whole number system starts from $$0$$, so the predecessor of the number $$1$$ is $$0$$ in whole number system.
Question 8
1 / -0

Mark the correct alternative of the following.
How many three digit numbers are there in all?

A
$$100$$

B
$$900$$

C
$$99$$

D
$$102$$

Solution

Largest 3-digit number = 999
Smallest 3-digit number =100
Total 3-digit numbers = Largest 3-digit - Smallest 3-digit + 1
Total 3- digit numbers = 999 - 100 + 1 = 900
Question 9
1 / -0

Mark the correct alternative of the following.
The product of the successor and predecessor of $$99$$ is?

A
$$9800$$

B
$$9900$$

C
$$1099$$

D
$$9700$$

Solution

The successor and the predecessor of the number $$99$$ are $$99+1=100 $$ and $$99-1=98$$ respectively.
So the product of the successor and the predecessor is $$98\times 100=9800$$.
Question 10
1 / -0

Mark the correct alternative of the following.
The predecessor of $$1$$ million is?

A
$$9999$$

B
$$99999$$

C
$$999999$$

D
$$1000001$$

Solution

The predecessor of the number $$1$$ million is the number just before it and it is $$10,00000-1=999,999$$.

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Re-Attempt Weekly Quiz Competition

Whole Numbers Test - 19

Result

Whole Numbers Test - 19

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Rank

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SHARING IS CARING

Question 1

$$a = b$$

$$a\neq b$$

$$a > b$$

$$a < b$$

Solution

Question 2

56

57

59

58

Question 3

$$8989899$$

$$8989901$$

$$8989999$$

$$none\ of\ these$$

Solution

Question 4

$$46$$

$$38$$

$$23$$

$$69$$

Solution

Question 5

12

7

19

5

Solution

Question 6

$$1$$

$$10$$

$$0$$

$$20$$

Solution

Question 7

$$0$$

$$-1$$

$$2$$

None of these

Solution

Question 8

$$100$$

$$900$$

$$99$$

$$102$$

Solution

Question 9

$$9800$$

$$9900$$

$$1099$$

$$9700$$

Solution

Question 10

$$9999$$

$$99999$$

$$999999$$

$$1000001$$

Solution

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