Aptitude and Reasoning Questions

Q:

The TrueDiscount on a certain sum of money due 3 years hence is Rs.250 and SimpeInterest on the same sum for same time and same rate is Rs375. Find sum and rate%?

A) (16 + 4/3)% B) (16 +1/3)%
C) (16 + 5/3)% D) (16 + 2/3)%
 
Answer & Explanation Answer: D) (16 + 2/3)%

Explanation:

sum = [(S.I x T.D)/(S.I-T.D)] = Rs. [(375 x 250)/(375-250)] = Rs.750 

Rate = (100 x 375)/(750 x 3) =1623 %

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Filed Under: True Discount

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Q:

In the following question, a matrix of certain characters is given.These characters follow a certain trend, row-wise or column wise.Find out this trend and choose the missing character accordingly

11 6 8
17 12 ?
25 34 19
19 28 11

A) 16 B) 15
C) 13 D) 9
 
Answer & Explanation Answer: A) 16

Explanation:

 

In the first column, 17 - 11 = 25 - 19 = 6.
In the second column, 12 - 6 = 34 - 28 = 6.
Let the missing number in the third column be y.
Then, y - 8 = 19 - 11 = 8 or y = 16.

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Q:

Virus doubles every 3 mins. It is 'K' in 1 hour, when was it K/4 ?

A) 29 min B) 25 min
C) 54 min D) 57 min
 
Answer & Explanation Answer: C) 54 min

Explanation:

If virus is K in 1hr i.e 60 min
then in 57 min it was K/2 as it doubles every 3 minutes
=> In 54 min it was K/4.
At 54 minutes it was K/4.

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Filed Under: Arithmetical Reasoning
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Q:

Sreya bought a plot for Rs. 6,00,000,  then sold half of the plot at 10 % profit and rest at 15% profit. What is the total profit % that Sreya gain? 

A) 13.8 % B) 11.4 %
C) 12.5 % D) 14.5 %
 
Answer & Explanation Answer: C) 12.5 %

Explanation:

10% profit at half plot = 600000/2 x 10/100 = Rs. 30,000

15% profit at remaining half plot = 600000/2 x 15/100 = Rs. 45,000

Now, total profit = 30000 + 45000 = 75000

Profit % = 75000/600000 x 100 = 12.5 %

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Filed Under: Profit and Loss
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Q:

A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:

A) 49 sq.m B) 50 sq.m
C) 51 sq.m D) 52 sq.m
 
Answer & Explanation Answer: A) 49 sq.m

Explanation:

ke

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Q:

 83% of 2350 = ?

A) 1889.95 B) 1912.35
C) 1875.25 D) 1950.50
 
Answer & Explanation Answer: D) 1950.50

Explanation:
83% of 2350 = ?
 
83/100 x 2350
 
=8.3 x 235
 
=1950.50
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Filed Under: Percentage
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Q:

Out of sixty students, there are 14 who are taking Economics and 29 who are taking Calculus. What is the probability that a randomly chosen student from this group is taking only the Calculus class ?

A) 8/15 B) 7/15
C) 1/15 D) 4/15
 
Answer & Explanation Answer: B) 7/15

Explanation:

Given total students in the class = 60
Students who are taking Economics = 24 and
Students who are taking Calculus = 32
Students who are taking both subjects = 60-(24 + 32) = 60 - 56 = 4
Students who are taking calculus only = 32 - 4 = 28
probability that a randomly chosen student from this group is taking only the Calculus class = 28/60 = 7/15.

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Filed Under: Probability
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Q:

1422 ÷ 1260.25 = ?

A) 586 B) 578
C) 568 D) 566
 
Answer & Explanation Answer: C) 568

Explanation:

142 x 142 x 11260.25

 

=> 142 x 142 x 135.5  = 568

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Filed Under: Simplification
Exam Prep: CAT , Bank Exams , AIEEE
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