Knowing our Numbers Test

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Knowing our Numbers Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

Jessica walks $$2\ km$$ a day. How many meters does she walk in two days ?

A
$$40$$ meters

B
$$400$$ meters

C
$$4000$$ meters

D
$$4$$ meters

Solution

given that
Jessica walks $$2 km$$ a day.
Total distance travelled by Jessica in TWO days is $$2 \times 2 =4km$$
We know that
$$1$$ $$kilometer =1000$$ $$m$$
$$1$$ $$m =\dfrac1{1000}$$ $$km$$
Given That, we have to convert $$4$$ $$km$$ into $$m$$
$$4$$ $$km =4 \times 1000$$ $$m$$
$$=4000$$ $$m$$
So, Option $$C $$ is correct
Question 2
1 / -0

Distance between two houses is $$40$$ m. If a new house with area $$4\times 4$$ is constructed in the middle of $$2$$ houses, then find the distance between middle house and one of the corner house.

A
$$20$$ m

B
$$19$$ m

C
$$18$$ m

D
$$17$$ m

Solution

The distance of middle point of middle house from the corner house is $$\dfrac { 40 }{ 2 } =20$$ and house to house distance will be $$\therefore 20-2=18$$
The distance between he Middle house and Corner house will be $$18$$ m.
Question 3
1 / -0

By referring the given figure, identify the distance between $$A$$ and $$C$$.

A
$$4.5$$

B
$$5.5$$

C
$$6.5$$

D
$$10$$

Solution

For calculating the distance between $$A$$ and $$C$$, we need the sum of the distances between the points.
$$AC=1+2+1+1.5=5.5$$
Question 4
1 / -0

Rosy measured a line for his art project. It is $$400$$ millimeters long. How many centimeters is the line?

A
$$40$$ cm

B
$$4$$cm

C
$$400$$ cm

D
$$0.4$$ cm

Solution

The total length of the line is $$400$$ mm.
We know that $$1$$ $$\text{centimeter} =10$$ $$\text{millimeters}$$
$$1$$ mm $$=\dfrac1{10}$$ cm
We have to convert the $$400$$ mm to cm.
$$400$$ mm $$ =\dfrac1{10} \times 400$$ cm
$$=\dfrac{400}{10} $$ cm
$$= 40 $$ $$\text{centimeter}$$
The line is $$40$$ cm long.
So, option A is correct.
Question 5
1 / -0

Round-off $$4353$$ to nearest $$100$$.

A
$$4353$$

B
$$4350$$

C
$$4360$$

D
$$4400$$

Solution

$$\Rightarrow$$ The given number is $$4353$$
$$\Rightarrow$$ In number 4353, its tens digit is 5, which is equal to 5.
$$\Rightarrow$$ So, we increase the digits at hundreds place by 1 and replace each one of the digits at tens and ones place by 0 to round off the given number to nearest to 100.
$$\therefore$$ The number becomes $$4400$$
Question 6
1 / -0

Round-off $$3789$$ to nearest $$100$$

A
$$3789$$

B
$$3790$$

C
$$3800$$

D
$$4000$$

Solution

$$\Rightarrow$$ The given number is $$3789$$
$$\Rightarrow$$ In number 3789, its tens digit is 8, which is greater than 5.
$$\Rightarrow$$ So, we increase the digits at hundreds place by 1 and replace each one of the digits at tens and ones place by 0 to round off the given number to nearest to 100.
$$\therefore$$ The number becomes $$3800$$
Question 7
1 / -0

Round-off $$52,398$$ to nearest $$1000$$.

A
$$52,390$$

B
$$52,400$$

C
$$52,000$$

D
$$53,000$$

Solution

$$\Rightarrow$$ The given number is $$52,398$$
$$\Rightarrow$$ In number $$52398$$, its hundred digit is $$3$$, which is less than $$5$$.
$$\Rightarrow$$ So, we replace each one of the digits at hundreds, tens and ones place by $$0$$ to round off the given number to nearest $$1000$$.
$$\therefore$$ The number obtained is $$52,000$$
Question 8
1 / -0

Round-off $$76,890$$ to nearest $$10$$.

A
$$76,890$$

B
$$76,880$$

C
$$76,900$$

D
$$77,000$$

Solution

$$\Rightarrow$$ The given number is $$76,890$$.
$$\Rightarrow$$ In number 76890, its unit digit is $$0$$, which is already nearest to 10.
$$\Rightarrow$$ So, don't need to change anything.
$$\therefore$$ $$76,890$$ is nearest to 10.
Question 9
1 / -0

Round-off $$47,897$$ to nearest $$1000$$.

A
$$47,897$$

B
$$48,000$$

C
$$47,900$$

D
$$47,890$$

Solution

$$\Rightarrow$$ The given number is $$47,897$$
$$\Rightarrow$$ In number 47897, its hundred digit is 8, which is greater than 5.
$$\Rightarrow$$ So, we increase the digits at thousand place by 1 and replace each one of the digits at hundreds, tens and ones place by $$0$$ to round off the given number to nearest to 1000.
$$\therefore$$ The number becomes $$48,000$$
Question 10
1 / -0

If Tina weighs $$\dfrac{2}{3}$$times than Reema and Reema weighs $$45$$ kg, then Tina's weight is

A
$$45$$

B
$$30$$

C
$$15$$

D
$$50$$

Solution

Weight of Reema $$=w=45\ \ Kg$$
Weight of Tina $$=\dfrac{2}{3}w=\dfrac{2}{3}\times{45}=30\ \ Kg$$
Option $$B$$ is correct.

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Knowing our Numbers Test - 17

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Knowing our Numbers Test - 17

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SHARING IS CARING

Question 1

$$40$$ meters

$$400$$ meters

$$4000$$ meters

$$4$$ meters

Solution

Question 2

$$20$$ m

$$19$$ m

$$18$$ m

$$17$$ m

Solution

Question 3

$$4.5$$

$$5.5$$

$$6.5$$

$$10$$

Solution

Question 4

$$40$$ cm

$$4$$cm

$$400$$ cm

$$0.4$$ cm

Solution

Question 5

$$4353$$

$$4350$$

$$4360$$

$$4400$$

Solution

Question 6

$$3789$$

$$3790$$

$$3800$$

$$4000$$

Solution

Question 7

$$52,390$$

$$52,400$$

$$52,000$$

$$53,000$$

Solution

Question 8

$$76,890$$

$$76,880$$

$$76,900$$

$$77,000$$

Solution

Question 9

$$47,897$$

$$48,000$$

$$47,900$$

$$47,890$$

Solution

Question 10

$$45$$

$$30$$

$$15$$

$$50$$

Solution

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