Aptitude and Reasoning Questions

Q:

Relation Between Efficiencies

6 boys and 8 girls finish a job in 6 days and 14 boys and 10 girls finish the same job in 4 days. In how many days working together 1 boy and 1 girl can finish the work?

Answer

Sol : In this kind of questions we find the work force required to complete the work in 1 day (or given unit of time) then we equate the work force to find the relationship between the efficiencies (or work rate) between the different workers.


 


Therefore, 6B+8G = 6 days


 => 6(6B+8G)= 1 day  (inversely proportional)


 => 36B+48G =1         ( by unitary method)


 


Again  14B+10G = 4days


 => 56B+40G =1


 


so, here it is clear that either we employ 36B and 48G to finish the work in 1 day or 56B and 40G to finish the same job in 1 day. thus , we can say


 => 36B+48G = 56B+40G


 => G= 2.5B


Thus a Girl is 2.5 times as efficient as a boy.


 


Now, since  36B+48G = 1


 => 36B+48(2.5 B)=1


 =>156B=1


i.e., to finish the job in 1 day 156 boys are required or the amount of work is 156 boys-days


 


Again    1G+1B=2.5B+1B=3.5B


 


Now, since 156 boys can finish the job in 1 day


so 1 boy can finish the job in 156 days


Therefore, 3.5 boys can finish the job in 1×1563.5= 47 days.


 


 

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Subject: Time and Work

2 3519
Q:

Arrange the given words in the sequence in which they occur in the dictionary.

i. Premanifest
ii. Premalignant
iii. Premake
iv. Premarital

 

A) ii, iii, iv, i B) iii, ii, i, iv
C) iv, i, ii, iii D) i, ii, iii, iv
 
Answer & Explanation Answer: B) iii, ii, i, iv

Explanation:
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Filed Under: Logical Sequence of Words
Exam Prep: Bank Exams

3 3516
Q:

Refer the below data table and answer the following question.

What was the total profit or loss of the company in last 5 years?

A) Profit of Rs 45 crores B) Profit of Rs 55 crores
C) Loss of Rs 45 crores D) Loss of Rs 55 crores
 
Answer & Explanation Answer: A) Profit of Rs 45 crores

Explanation:
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Filed Under: Table Charts
Exam Prep: Bank Exams

0 3515
Q:

What is the positive square root of [25 + 4√39]?

 

A) √13 + 2√3   B) √13 + 3√2  
C) √11 + 2√3 D) 11 + 3√2  
 
Answer & Explanation Answer: A) √13 + 2√3  

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 3514
Q:

Select the related word/letters/number from the given alternatives.

FUNGI: MYCOLOGY:: TISSUE: ??

A) Haematology B) Cytology
C) Histology D) Bacteriology
 
Answer & Explanation Answer: C) Histology

Explanation:
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Filed Under: Analogy
Exam Prep: Bank Exams

0 3513
Q:

In the following question, select the related word pair from the given alternatives.

 

Editor : Newspaper : : ? : ?

 

A) Farmer : Sell B) Wall : Mason
C) Chef : Knife D) Poet : Poem
 
Answer & Explanation Answer: D) Poet : Poem

Explanation:
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Filed Under: Analogy
Exam Prep: Bank Exams

1 3511
Q:

Group the given figures into three classes using each figure only once.

A) 1,5,8 ; 3,4,7 ; 2,6,9 B) 1,3,6 ; 4,5,9 ; 2,7,8
C) 1,3,6 ; 2,5,7 ; 4,8,9 D) 6,7,8 ; 1,3,7 ; 2,4,9
 
Answer & Explanation Answer: C) 1,3,6 ; 2,5,7 ; 4,8,9

Explanation:

1, 3, 6 contain one complete circle each.

2, 5, 7 contain a semi-circle each. 

4, 8, 9 contain a triangle each.

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Filed Under: Grouping of Images

20 3511
Q:

The difference between a number and its three-iflh is 50. What is the number ?

A) 75 B) 100
C) 125 D) 150
 
Answer & Explanation Answer: C) 125

Explanation:

Let the number be x. Then, x - 3x/5 = 50  <=>  x = (50 * 5) / 2 = 125..

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Filed Under: Problems on Numbers

0 3509