Aptitude and Reasoning Questions

Q:

A,B and C together can finish a task in 7.5 days. C is thrice as productive as A and B alone can do the task in 15 days. In how many days can A and C do the job if B goes on leave?

A) 30 B) 10
C) 20 D) 15
 
Answer & Explanation Answer: D) 15

Explanation:
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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

The average weight of 50 boys in a class is 45 Kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.

A) 50 Kg B) 50.8 Kg
C) 49 Kg D) 49.9 Kg
 
Answer & Explanation Answer: D) 49.9 Kg

Explanation:

Total weight of 50 boys = 45 X 50 = 2250

Average weight of 49 boys = 44.9

Total weight of 49 boys = 44.9 X 49 = 2200.1

Weight of boy who left the class=2250–2200.1=49.9

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Filed Under: Average

3 3603
Q:

One paper is equally folded 35 times, then what is the new thickness of the paper ?

A) T(2^50) B) 50T
C) 2 x 50 T D) T/50
 
Answer & Explanation Answer: A) T(2^50)

Explanation:

Let initial thickness of the paper be 'T'
after first fold it will be '2T' = 21T
after second fold it will be '4T' = 22T 
after 50th fold it will be T x (250T)

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Filed Under: Logic
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5 3603
Q:

Choose the correct alternative that will continue the same pattern and replace 'x' in the series 31,45,35,47,39,x,43,51,47,53

A) 48 B) 49
C) 36 D) 38
 
Answer & Explanation Answer: B) 49

Explanation:

The given sequence is a combination of two series
1)31,35,39,43,47
2) 45,47,49,51,53
So,the missing term is 49

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Filed Under: Number Series

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Q:

48 people could complete a task in 17 days. After 6 days, 4 of the workers left. How many days from then will it take to complete the task?

A) 12 B) 13
C) 15 D) 16
 
Answer & Explanation Answer: A) 12

Explanation:

Given, 48 people can do a work in 17 days. So total work = 48 x 17 = 816
Work done by 48 people in 6 days = 288.

The remaining work = 816 - 288 = 528
After 6 days four workers left. So number of people working is 44
Total number of days required for 44 men to complete the remaining work = 528/44 = 12

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Filed Under: Time and Work
Exam Prep: AIEEE , Bank Exams , CAT

1 3602
Q:

Which term is a type of detail?

A) chronology B) prose
C) style D) statistic
 
Answer & Explanation Answer: A) chronology

Explanation:

In chronology, the sequence of events from the latest to the oldest events or vice versa is laid. In this case, the details of how a particular event or place or thought developed through time is detailed in a chronology. 

 

Hence, the term chronology is a type of detail.

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Filed Under: Alphabet Test
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Q:

Pipe A is an inlet pipe that can fill an empty cistern in 69 hours. Pipe B can drain the filled cistern in 46hours. When the cistern was filled the two pipes are opened one at a time for an hour each, starting withPipe B. how long will it take for the cistern to be empty?

A) 11 days 10 hours B) 11 days 7 hours
C) 11 days 12 hours D) 1 days 13 hours
 
Answer & Explanation Answer: B) 11 days 7 hours

Explanation:
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Filed Under: Pipes and Cistern
Exam Prep: Bank Exams

22 3598
Q:

Express 3/8 and 1/10 as a Decimals?

A) 1.375 & 1 B) 0.375 & 1
C) 13.75 & 1.1 D) 0.375 & 0.1
 
Answer & Explanation Answer: D) 0.375 & 0.1

Explanation:

3/8 as a Decimal :

In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple.

Now to make 8 into 1000, we multiply numerator and denominator with 125

=> 3 x 1258 x 125 = 3751000 = 0.375

 

1/10 as a Decimal :

1 divided into 10 parts of each 0.1.

 

Therefore, 3/8 = 0.375 and 1/10 = 0.1 in decimals.

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Filed Under: Decimal Fractions
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