Aptitude and Reasoning Questions

Q:

The ratio of male and female in a city is 7 : 8 respectively and percentage of children among male and female is 25 and 20 respectively. If number of adult females is 156800, what is the total population of the city?

A) 4,12,480 B) 3,67,500
C) 5,44,700 D) 2,98,948
 
Answer & Explanation Answer: B) 3,67,500

Explanation:

Let the total population be 'p'

Given ratio of male and female in a city is 7 : 8

In that percentage of children among male and female is 25% and 20%

=> Adults male and female % = 75% & 80%

But given adult females is = 156800

=> 80%(8p/15) = 156800

=> 80 x 8p/15 x 100 = 156800

=> p = 156800 x 15 x 100/80 x 8

=> p = 367500

Therefore, the total population of the city = p = 367500

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Filed Under: Ratios and Proportions
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

75 21206
Q:

If u : v : w = 3 : 6 : 8, then what will be the ratio of (u/v) : (v/w) : (w/u)?

 

A) 8 : 6 : 3   B) 8 : 4 : 3  
C) 5 : 9 : 12   D) 6 : 9 : 32
 
Answer & Explanation Answer: D) 6 : 9 : 32

Explanation:
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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

5 21202
Q:

If in a certan language FASHION is coded as FOIHSAN, how is PROBLEM codedin that code?

A) PELBORM B) PRBOELM
C) RPBOELM D) RPBOELM
 
Answer & Explanation Answer: A) PELBORM

Explanation:

The first and the last letters of the word remain as such and the remaining letters are written in a reverse order, to obtain the code.

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Filed Under: Coding and Decoding

74 21198
Q:

When A, B and C are deployed for a task , A and B together do 70% of the work and B and C together do 50% of the work. who is most efficient?

A) A B) B
C) C D) can't be determined
 
Answer & Explanation Answer: A) A

Explanation:

A + B= 70%   

B + C =50%   

  (A+B)+(B+C)-(A+B+C)= B

=> B= 20%     A= 50%        and   C=30%

Hence A is most efficient

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Filed Under: Time and Work

31 21196
Q:

The probability of success of three students X, Y and Z in the one examination are 1/5, 1/4 and 1/3 respectively. Find the probability of success of at least two.

A) 1/4 B) 1/2
C) 1/6 D) 1/3
 
Answer & Explanation Answer: C) 1/6

Explanation:

P(X) = 15, P(Y) =14 , P(Z) = 13

 

Required probability:

 

= [ P(A)P(B){1−P(C)} ] + [ {1−P(A)}P(B)P(C) ] + [ P(A)P(C){1−P(B)} ] + P(A)P(B)P(C)

 

=14*13*45+34*13*15+23*14*15+14*13*15

 

460+360+260+160106016

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Filed Under: Probability

19 21188
Q:

A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

A) 2 : 1 B) 3 : 2
C) 25 : 18 D) 27 : 20
 
Answer & Explanation Answer: C) 25 : 18

Explanation:

Volume of the large cube = 33+43+53 = 216 cu.cm. 

Let the edge of the large cube be a. 

So, a3= 216 

=>a = 6 cm. 

Required ratio = 632+42+52662=2518

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18 21171
Q:

Read the question and answer from the given information.

 

Should the govt stop giving permission to new industries.

 

Argument 1: Yes, new industries create environmental pollution

Argument 2: No, New industries improves employment and takes part in economic growth of country

 

A) II only is correct B) Neither I nor II is correct
C) Either I or II is correct D) I only is correct
 
Answer & Explanation Answer: A) II only is correct

Explanation:
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Filed Under: Statement and Conclusions
Exam Prep: Bank Exams

0 21165
Q:

An Assertion (A) and a Reason (R) are given below.

 

Assertion (A) : Earthworms are not good for agriculture.

Reason (R) : Earthworms break down the soil into fine particles and make it soft.

 

Choose the correct option.

 

A) A is true but R is false B) A is false but R is true
C) Both A and R are true and R is the correct explanation of A D) Both A and R are false
 
Answer & Explanation Answer: B) A is false but R is true

Explanation:
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Filed Under: Statement and Conclusions
Exam Prep: Bank Exams

0 21162