Aptitude and Reasoning Questions

Q:

A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

A) 75 B) 82
C) 100 D) 110
 
Answer & Explanation Answer: D) 110

Explanation:

Originally let there be x men.

Less men, More days     (Indirect Proportion)

 Therefore, (x-10) : x  :: 100 :110

=> (x - 10) * 110 = x * 100    => x= 110

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Filed Under: Chain Rule

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Q:

4 + (16) [-10 x 25 - 13 - 3 ÷ -5] = ?

 

A) 8 B) 9
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is ?

A) 45 kmph B) 25 kmph
C) 30 kmph D) 50 kmph
 
Answer & Explanation Answer: D) 50 kmph

Explanation:

Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec.
[(25/2) x (18/5)] km/hr = 45 km/hr.
Let the speed of the train be 'S' km/hr.
Then, relative speed = (S - 5) km/hr.
S - 5 = 45 => S = 50 km/hr.

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Filed Under: Problems on Trains
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Q:

The difference between compound interest and simple interest on a sum for two years at 8% per annum, where the interest is compounded annually is Rs.16. if the interest were compounded half yearly , the difference in two interests would be nearly

A) Rs.24.64 B) Rs.21.85
C) Rs.16 D) Rs.16.80
 
Answer & Explanation Answer: A) Rs.24.64

Explanation:

For 1st year S.I =C.I.

 

Thus, Rs.16 is the S.I. on S.I. for 1 year, which at 8% is thus Rs.200

 

i.e S.I on the principal for 1 year is Rs.200

 

Principle = Rs.100*2008*1 = Rs.2500

 

Amount for 2 years, compounded half-yearly

 Rs.2500*1+41004=Rs.2924.4

 

C.I = Rs.424.64

 

Also, S.I=Rs.2500*8*2100=Rs.400

 

Hence, [(C.I) - (S.I)] = Rs. (424.64 - 400) = Rs.24.64

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Filed Under: Compound Interest
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Q:

Find the next number in the given number sequence?

9, 19, 21, 43, 45, ...

A) 88 B) 54
C) 91 D) 49
 
Answer & Explanation Answer: C) 91

Explanation:

The given number series 9, 19, 21, 43, 45, ... follows a pattern that

ALternately (x 2 + 1) and  (x 1 + 2)

9 x 2 + 1 = 19

19 x 1 + 2 = 21

21 x 2 + 1 = 43

43 x 1 + 2 = 45

45 x 2 + 1 = 91

 

Hence, the next number in the given sequence is 91.

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Filed Under: Number Series
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Q:

What is the simplified value of 

125 - 24 - 124-23+123 - 22 - 122 - 21+ 121 - 20 ?

A) 5 + 2√5 B) 5 – 5√2
C) √25 + √21 D) √25 – 4
 
Answer & Explanation Answer: A) 5 + 2√5

Explanation:
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Filed Under: Simplification
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Q:

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

Play:Actor::Concert:?

A) Symphony B) Musician
C) Piano D) Percussion
 
Answer & Explanation Answer: B) Musician

Explanation:
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Filed Under: Analogy
Exam Prep: Bank Exams

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Q:

A man is facing north-west. He turns 90o in the clockwise direction, then 180o in the anticlockwise direction and then another 90o in the same direction. Which direction is he facing now?

A) South B) South-west
C) South-east D) East
 
Answer & Explanation Answer: C) South-east

Explanation:

As shown in fig. the man initially faces in the direction OP. On moving 900 clockwise, he faces in the direction OX. On further moving 1800 anticlockwise, he faces in the direction OY. Finally, on moving 900anticlockwise, he faces in the direction OZ, which is South-east.new1497431743.jpg image

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Filed Under: Direction Sense Test
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