Numerical Ability Test

Result

Numerical Ability Test - 3

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Weekly Quiz Competition

Question 1
5 / -1

If 370 students appeared for an examination, of which 352 passed, then the find the pass percentage (approximate).

A
95%

B
90%

C
97%

D
86%

Solution

Given:
No of students = 370
No of students passed = 352
Formula used:
Pass percentage = No of students passed/Total students × 100
Calculation:
∴ Pass percentage = 352/370 × 100
⇒ 95.13%
⇒ 95% (Approximately)
Question 2
5 / -1

if 20% of x is 30 and 35% of y is 70, then find the value of (x + y).

A
350

B
450

C
500

D
250

Solution

Given:
20% of x = 30
35% of y = 70
Calculation:
According to the question
0.2x = 30
⇒ x = 150
Again, According to the question
0.35y = 70
⇒ y = 200
∴ x + y = 200 + 150 = 350
Question 3
5 / -1

The population of a town increases 5% annually. If its present population is 74970, what it was 2 years ago?

A
64290

B
72090

C
63165

D
68000

Solution

Given:
The population of a town increased = 5%
Present population = 74970
Formula used:
Population after each increment = x × (100 + r)/100
Calculation:
Let the population of city 2 years before be x
Then,
⇒ x × (105/100) × (105/100) = 74970
⇒ x = 74970 × (20/21) × (20/21)
⇒ x = 68000
∴ The population 2 years ago is 68000
Question 4
5 / -1

25% of a number is 20, what is 40% of that number

A
80

B
40

C
32

D
136

Solution

Given:
25% of a number is 20
Calculation:
Let the number be = a
25% × a = 20
⇒ 25/100 × a = 20
⇒ a = 20 × 100/25 = 80
∴ 40% of a = 40/100 × 80 = 32
Alternate Method 25% = 1/4
⇒ 1/4 = 20
⇒ 4 = 20 × 4 = 80
∴ 40% of the number = 2/5 × 80 = 32
Question 5
5 / -1

On the first day, 84500 people visited a trade fair. On the 4^th day, the number was reduced to 16900. By what percentage were people reduced on the 4^th day?

A
0%

B
75%

C
80%

D
20%

Solution

Given:
No of visitors on day 1 = 84500
No of visitors on day 4 = 16900
Calculations:
Reduce in number of visitors = 84500 - 16900 = 67600
∴ The required reduce percentage = \(\frac{84500 - 16900}{84500} \times 100\) = 80%
Question 6
5 / -1

Salary of a man was Rs. 20,000. the same was increased by 14%, find the new salary ?

A
25600

B
22800

C
21600

D
24800

Solution

Given:
salary of a man = Rs. 20,000
Increment in salary = 14%
Formula Used:
Increased salary = Old salary + increment in salary
calculation:
Increment of salary by 14%
14% of Rs 20,000 = 2800
⇒ New salary of a man = 20,000 + 2800
⇒ Rs. 22,800
∴ The new salary of man will be Rs. 22800.
Question 7
5 / -1

Ram bought a television for Rs. 16000. If the value of the television decreases by 5% annum, then what will be the value of the television after 3 years?

A
13710

B
13720

C
13728

D
13718

Solution

Given :
Ram bought a television for Rs. 16000.
Rate of television decreases by 5% every year
Calculations :
Rate of television after 1 year = 16000 - 5% of 16000
⇒ 16000 - 800
⇒ 15200
Rate after 2 years = 15200 - 5% of 15200
⇒ 15200 - 760
⇒ 14440
Rate after 3 years = 14440 - 5% of 14440
⇒ 14440 - 722
⇒ 13718
∴ Option 4 is the correct choice.
Alternate Method
Rate of television after 3 years = 16000 × (100 - 5)/100) × (100 - 5)/100) × (100 - 5)/100)
⇒ 16000 × (19/20) × (19/20) × (19/20)
⇒ 13718
∴ Option 4 is the correct choice.
Question 8
5 / -1

A student has to obtain 35% of the total marks to pass. He got 135 marks and failed by 40 marks. The maximum marks are _______.

A
350

B
500

C
550

D
400

Solution

Given:
A student has to obtain 35% of the total marks to pass. He got 135 marks and failed by 40 marks.
Formula Used:
Pass marks = Marks received + Marks by which he/she fails
Calculation:
Let the maximum marks be 'x'
⇒ pass marks = 135 + 40 = 175
also, pass marks = 35% of the total marks
⇒ 175 = 35/100 × x
⇒ x = 500
∴ Required maximum marks = 500
Question 9
5 / -1

What is the value of (42% of 7200) - (12% of 4800)?

A
2138

B
2448

C
3348

D
2918

Solution

42% of 7200 = 0.42 × 7200 = 3024
12% of 4800 = 0.12 × 4800 = 576
∴ 3024 - 576 = 2448
Question 10
5 / -1

In an election between 2 candidates, one got 60 percent of the total valid votes, 20 percent of the total votes were invalid. If the total number of votes were 8000, how many valid votes did the other candidate get?

A
2560

B
1920

C
1280

D
3200

Solution

Given:
The total number of votes = 8000
Formula used:
GM% = (GM/TM) × 100 Where, GM = The gain marks, and TM = The total marks
Calculation:
Let us assume the other candidate got valid votes be X
⇒ The total valid votes = 8000 × (80/100) = 6400
⇒ The other candidate got valid votes X = (100% - 60%) of 6400 = (40/100) × 6400 = 2560
∴ The required result will be 2560.

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Re-Attempt Weekly Quiz Competition

Numerical Ability Test - 3

Result

Numerical Ability Test - 3

Score

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Rank

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SHARING IS CARING

Question 1

95%

90%

97%

86%

Solution

Question 2

350

450

500

250

Solution

Question 3

64290

72090

63165

68000

Solution

Question 4

80

40

32

136

Solution

Question 5

0%

75%

80%

20%

Solution

Question 6

25600

22800

21600

24800

Solution

Question 7

13710

13720

13728

13718

Solution

Question 8

350

500

550

400

Solution

Question 9

2138

2448

3348

2918

Solution

Question 10

2560

1920

1280

3200

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

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