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

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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.

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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.
$AC=1+2+1+1.5=5.5$

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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.

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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 $4400$

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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 $3800$

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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 $52,000$

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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.

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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 $48,000$

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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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Re-Attempt Weekly Quiz Competition

Knowing our Numbers Test - 17

Result

Knowing our Numbers Test - 17

Score

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Rank

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SHARING IS CARING

Question 1

404040 meters

400400400 meters

400040004000 meters

444 meters

Solution

Question 2

202020 m

191919 m

181818 m

171717 m

Solution

Question 3

4.54.54.5

5.55.55.5

6.56.56.5

101010

Solution

Question 4

404040 cm

444cm

400400400 cm

0.40.40.4 cm

Solution

Question 5

435343534353

435043504350

436043604360

440044004400

Solution

Question 6

378937893789

379037903790

380038003800

400040004000

Solution

Question 7

52,39052,39052,390

52,40052,40052,400

52,00052,00052,000

53,00053,00053,000

Solution

Question 8

76,89076,89076,890

76,88076,88076,880

76,90076,90076,900

77,00077,00077,000

Solution

Question 9

47,89747,89747,897

48,00048,00048,000

47,90047,90047,900

47,89047,89047,890

Solution

Question 10

454545

303030

151515

505050

Solution

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Question Analysis

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$40$ meters

$400$ meters

$4000$ meters

$4$ meters

$20$ m

$19$ m

$18$ m

$17$ m

$4.5$

$5.5$

$6.5$

$10$

$40$ cm

$4$ cm

$400$ cm

$0.4$ cm

$4353$

$4350$

$4360$

$4400$

$3789$

$3790$

$3800$

$4000$

$52,390$

$52,400$

$52,000$

$53,000$

$76,890$

$76,880$

$76,900$

$77,000$

$47,897$

$48,000$

$47,900$

$47,890$

$45$

$30$

$15$

$50$