Aptitude and Reasoning Questions

Q:

A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C which is at midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ? 

A) 180 km B) 160 km
C) 140 km D) 120 km
 
Answer & Explanation Answer: A) 180 km

Explanation:

Speed in downstream = (14 + 4) km/hr = 18 km/hr;

Speed in upstream = (14 – 4) km/hr = 10 km/hr.

Let the distance between A and B be x km. Then,

x/18 + (x/2)/10 = 19 ⇔ x/18 + x/20 = 19 ⇒ x = 180 km.

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Filed Under: Boats and Streams
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

90 30797
Q:

The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new students is?

Answer

Total age of 10 students = 150 years


Total age of 15 students = 240 years


Total age of 5 new students = 240 - 150 = 90 years


\inline \therefore Average age of 5 new students =  = 18 years

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Subject: Problems on Ages

155 30785
Q:

Find the odd word/letters/number pair from the given alternatives.

(A) Square (B) Sphere (C) Rectangle (D) Circle

A) A B) B
C) C D) D
 
Answer & Explanation Answer: B) B

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

1 30780
Q:

Find the total surface area (in cm2) of a hemisphere of diameter 21 cm.

 

A) 1039.5   B) 844.5  
C) 637   D) 472
 
Answer & Explanation Answer: A) 1039.5  

Explanation:
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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

2 30779
Q:

In the following question, select the missing number from the given series.

 

64, 75, 86, 97, ?, 119

 

A) 118 B) 108
C) 98 D) 109
 
Answer & Explanation Answer: B) 108

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

2 30751
Q:

Find the odd word/letters/number pair from the given alternatives.

 

A) Teacher and Student B) Chemistry and Science
C) History and Mathematics D) Air and Oxygen
 
Answer & Explanation Answer: C) History and Mathematics

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 30743
Q:

The smallest number which when diminished by 7,  is divisible by  12, 16, 18, 21 and 28 is

A) 1008 B) 1015
C) 1022 D) 1032
 
Answer & Explanation Answer: B) 1015

Explanation:

Required Number = (L.C.M  of 12, 16, 18,21,28)+7

= 1008 + 7

= 1015

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Filed Under: HCF and LCM

101 30727
Q:

In the following question, select the missing number from the given series.

 

57, 54, 48, 39, ?, 12

 

A) 27 B) 30
C) 25 D) 22
 
Answer & Explanation Answer: A) 27

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

2 30725