Aptitude and Reasoning Questions

Q:

Karthik is now 32 years old and his son is 7 years old. In how many years will Karthik be twice as old as the son?

A) 18 B) 25
C) 7 D) 15
 
Answer & Explanation Answer: A) 18

Explanation:

Given Karthik’s age = 32 years

Karthik’s son age = 7 years

Difference between their ages = K - S = 32 - 7 = 25 years ….(1)

Now, required K = 2S ……(2)

Put (2) in (1)

2S - S = 25

=> S = 25 years

Hence, at the age of 25 years of Karthik’s son, Karthik will be twice as his son’s age.

25 - 7 = 18 years

 

Therefore, after 18 years the father be twice as old as the son.

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Filed Under: Problems on Ages
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Q:

In a certain code language, "HISTORY" is written as "XQNSRHI". How is "ETHICS" written in that code language?

A) DSGHBR B) RBHGSF
C) RBHDSG D) GSDRBH
 
Answer & Explanation Answer: B) RBHGSF

Explanation:
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Filed Under: Coding and Decoding
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Q:

In how many ways the letters of the word 'CIRCUMSTANCES' can be arranged such that all vowels came at odd places and N always comes at end?

A) 1,51,200 ways. B) 5,04,020 ways
C) 72,000 ways D) None of the above
 
Answer & Explanation Answer: A) 1,51,200 ways.

Explanation:

In circumcstances word there are 3C's, 2S's, I, U,R, T, A, N, E

Total = 13 letters

But last letter must be N

Hence, available places = 12

In that odd places = 1, 3, 5, 7, 9, 11

Owvels = 4

This can be done in 6P4 ways 

Remaining 7 letters can be arranged in 7!/3! x 2! ways

 

Hence, total number of ways = 6P4 x 7!/3! x 2! = 360 x 5040/12 = 1,51,200 ways.

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Filed Under: Permutations and Combinations
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Q:

When a number is divided by 138 the remainder is 26. What will be the remainder if the same number is divided by 23 ?

A) 4 B) 6
C) 3 D) 1
 
Answer & Explanation Answer: C) 3

Explanation:

Number = quotient x divisor + remainder;
so, here
number = 138 k + 26
=> (23 x 6k) + (23+3)
=> 23(6k+1)+3
so, remainder is 3.

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Filed Under: Numbers
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Q:

Select a suitable figure from the four alternatives that would complete the figure matrix.

4_281484716123.png image

A) 3 B) 1
C) 2 D) 4
 
Answer & Explanation Answer: C) 2

Explanation:

The third figure in each row comprises of parts which are not common to the first two figures.

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Filed Under: Figure Matrix
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Q:

A : The Government has decided to roll back the hike in the prices of cooking gas and kerosene

B : Some ministers had resigned in protest against the hike in prices of cooking gas and other petroleum products. 

A) If 'A' is the effect and 'B' is its immediate and principal cause. B) If 'A' is the immediate and principal cause and 'B' is its effect
C) If 'A' is an effect but 'B' is not its immediate and principal cause D) If 'B' is an effect but 'A' is not its immediate and principal cause
 
Answer & Explanation Answer: B) If 'A' is the immediate and principal cause and 'B' is its effect

Explanation:

Reduction of its stake in nationalised banks by the government is a steps towards privatisation of bank. And this is a reason of strike in bank by the bank employees.

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Q:

A plane is going in circles around an airport. The plane takes 3 minutes to complete one round. The angle of elevation of the plane from a point P on the ground at time t seconds is equal to that at time (t + 30) seconds. At time (t + x) seconds, the plane flies vertically above the point P. What is x equal to?

A) 75 seconds B) 90 seconds
C) 105 seconds D) 135 seconds
 
Answer & Explanation Answer: C) 105 seconds

Explanation:
Let the plane be at point A at t se
conds and at point B
after t + 30 seconds
Since the motion is uniform, we can say that at time t+15 seconds, the plane is above the point is
diametrically opposite to the point P from where the angle is same.
Now since the time taken to cover the full circ
le is 3 minutes (180
seconds), the time taken by the plane
to reach the diametrically opposite point will be 90 seconds.
So the time after which the plane reaches the point P will be = t+ 15 + 90 seconds = (t + 105 )seconds
 
 
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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

If 184 = 11, 168 = 12 and 612 = 9, then find the value of 1814 = ?

A) 16 B) 12
C) 4 D) 20
 
Answer & Explanation Answer: A) 16

Explanation:
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Filed Under: Coding and Decoding
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