Knowing Our Numbers Test

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Knowing Our Numbers Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

The bacterial growth in a dirty area is 4,53,78,967. After cleaning, it becomes 54,53,734. Find the number of bacteria that were killed.

A
3,99,26,233

B
3,99,24,233

C
3,99,24,240

D
3,99,25,233

Solution

Number of bacteria that were killed = 4,53,78,967 - 54,53,734 = 3,99,25,233
Question 2
1 / -0

4,53,578 toys were made in a day in a factory and 4,357 were sold from the factory outlet. The next day, 758 more toys were made and 8,427 were sold. What is the number of toys left in the factory?

A
3,41,552

B
4,44,552

C
4,45,552

D
4,41,552

Solution

Number of toys initially = 4,53,578 - 4,357 = 4,49,221
Number of toys on the second day = 4,49,221 + 758 = 44,9,979
Number of toys after selling toys on the second day = 4,49,979 - 8,427 = 4,41,552
Question 3
1 / -0

Total number of questions made in a content company per day is 1,125. Assume that the company workers had to work all days, excluding 4 Sundays in each month. What is the total number of questions made in the months of March, April and July altogether? (Assume that all the given months have 4 Sundays)

A
76,589

B
82,561

C
85,500

D
90,000

Solution

Number of questions in a day = 1,125
In the month of March = 31 - 4 = 27 working days = 27 x 1,125 = 30,375
In the month of April = 30 - 4 = 26 x 1,125 = 29,250
In the month of July = 31 - 4 = 27 x 1,125 = 30,375
Total = 2 x 30,375 + 29,250 = 90,000
Question 4
1 / -0

Rakesh did a multiplication sum of 253 ×17 and got the answer. He suddenly realised that the question given by teacher was 253 × 71. So, what will be the difference between his answer and the required answer?

A
15332

B
13445

C
12663

D
13662

Solution

Answer given by Rakesh = 253 × 17 = 4301
Actual result = 253 × 71 = 17963
Required difference = 17963 - 4301 = 13662

Question 5

1 / -0

Directions For Questions

The below question consists of 3 statements with some blanks. Choose the correct answer for the blanks by referring to the codes given in table.

...view full instructions

(i) The number 456,785 nearest ten thousand is rounded off to P .
(ii) Estimated product of 5023 and 218 is Q .
(iii) MMXVIII is written in the Hindu-Arabic numeral as R .

	p	Q	R
A	450,000	900,000	2,016
B	460,000	1,000,000	2,018
C	440,000	1,110,000	2,017
D	455,000	1,105,000	2,019

A

B

C

D

Solution

(I) 456,785 when rounded to nearest ten thousand is 460,000 as 6 in the thousand is greater than 5.
(II) 5,023 is rounded to 5,000 and 218 is rounded to 200. The product is 1,000,000.
(III) M = 1000
X = 10
V = 5
I = 1
Together, we get = 2018

Question 6
1 / -0

The difference in the place values of 6 between the greatest and the smallest 4-digit numbers formed by using the digits 6, 7, 8 and 9 each only once is

A
4,562

B
6,523

C
7,546

D
5,994

Solution

The greatest number = 9,876
Place value of 6 = 6
The smallest number = 6,789
Place value of 6 = 6,000
Difference = 6000 - 6 = 5994
Question 7
1 / -0

State 'T for true and 'F' for false.

I. Rounding 4,560 to the nearest thousand, we get 4,000.
II. Place value of 4 in 5,45,67,537 is four crore.
III. 1 lakh = 100 thousand
IV. Roman numeral for the largest two digit number is L.

I II III IV

A F F T F

B F T F F

C F T F T

D T F F T

A
A

B
B

C
C

D
D

Solution

(1) Rounding 4,560 to the nearest thousand, we get 4,000. It is false as its value will be 5000. (False)
(2) Place value of 4 in 5,45,67,537 is five crore. It is false as its place value is 40 lakh. (False)
(3) 1 lakh = 100 thousand. (True)
(4) Roman numeral for the largest two digit number is L. It is false as largest 2 two digit number is 99 and roman numeral is XCIX. (False)
Question 8
1 / -0

If a new number is formed by interchanging the tens and thousands place digits of 12,345, then what is the relation between them?

(A) New number is greater than the original number.
(B) New number is smaller than the original number.
(C) New number is equal to the original number.
(D) Cannot be determined

A
A

B
B

C
C

D
D

Solution

In 12,345, we have 2 in thousands and 4 in tens.
So, after interchanging the digits, new number = 14,325
It is greater than the original number.
14,325 > 12,345

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	I	II	III	IV
A	F	F	T	F
B	F	T	F	F
C	F	T	F	T
D	T	F	F	T

Knowing Our Numbers Test - 9

Result

Knowing Our Numbers Test - 9

Score

-

Rank

-

SHARING IS CARING

Question 1

3,99,26,233

3,99,24,233

3,99,24,240

3,99,25,233

Solution

Question 2

3,41,552

4,44,552

4,45,552

4,41,552

Solution

Question 3

76,589

82,561

85,500

90,000

Solution

Question 4

15332

13445

12663

13662

Solution

Question 5

A

B

C

D

Solution

Question 6

4,562

6,523

7,546

5,994

Solution

Question 7

A

B

C

D

Solution

Question 8

A

B

C

D

Solution

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