Aptitude and Reasoning Questions

Q:

I, J , K and L are all distinct individual. I is the daughter of J. J is the son of K and 'K' is the father of L. If B is the son of J and B has one brother, 'D'. Then which of the following statements is/ are true ?

I. I is the sister of D.

II. D and B are brother.

III. K is the grand father of D.

A) Only I B) I & II
C) Only III D) All of these
 
Answer & Explanation Answer: D) All of these

Explanation:

   K

   |

   J -- L

   |

   I -- D -- B

Here I is female

J, K, L & D , B are males

Then from the above conditions,

All of the given statements are true.

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Filed Under: Blood Relations
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Q:

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

 

13, 22, 66, ?, 225, 234, 702, 711

 

A) 65 B) 75
C) 80 D) 70
 
Answer & Explanation Answer: B) 75

Explanation:
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Filed Under: Number Series
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Q:

Arrange the given words in the sequence in which they occur in the dictionary.

1. Whimper

2. Where

3. Wherever

4.Wedding

5. Wednesday

A) 54231 B) 45231
C) 25134 D) 35241
 
Answer & Explanation Answer: B) 45231

Explanation:
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Filed Under: Logical Sequence of Words
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Q:

If the average of 31, x, 42, 39, 56, 78, 83 and 91 is 58.5, then what is the value of x?

 

A) 26 B) 34
C) 58 D) 48
 
Answer & Explanation Answer: D) 48

Explanation:
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Filed Under: Average
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Q:

If the price of diesel increases by 25% and Karthik intends to spend only an additional 15% on diesel, by how much % will he reduce the quantity of diesel purchased ?

A) 6.67 % B) 8 %
C) 7.41 % D) 9 %
 
Answer & Explanation Answer: B) 8 %

Explanation:

Let the price of 1 litre of diesel be Rs.x and let Karthik initially buy 'y' litres of diesel.
Therefore, he would have spent Rs. xy on diesel.

When the price of diesel increases by 25%, the new price per litre of diesel is 1.25x.

Karthik intends to increase the amount he spends on diesel by 15%.
i.e., he is willing to spend xy + 15% of xy = 1.15xy

Let the new quantity of diesel that he can get be 'q'.
Then, 1.25x x q = 1.15xy
Or q = (1.15/1.25)y = 0.92y.

As the new quantity that he can buy is 0.92y, he gets 0.08y lesser than what he used to get earlier.

Or a reduction of 8%.

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Filed Under: Percentage
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Q:

The variance of a set of data is 196. Then the standard deviation of the data is

 

A) +-14 B) 14
C) 96 D) 98
 
Answer & Explanation Answer: B) 14

Explanation:
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Filed Under: Probability
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Q:

Select the missing numbers from the given alternatives

8  21  4

27 ?   53

A) 35 B) 40
C) 17 D) 23
 
Answer & Explanation Answer: B) 40

Explanation:
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Filed Under: Number Series
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Q:

In a box, there are 9 blue, 6 white and some black stones. A stone is randomly selected and the probability that the stone is black is ¼. Find the total number of stones in the box? 

A) 15 B) 18
C) 20 D) 24
 
Answer & Explanation Answer: C) 20

Explanation:

We know that, Total probability = 1

Given probability of black stones = 1/4

=> Probability of blue and white stones = 1 - 1/4 = 3/4

But, given blue + white stones =  9 + 6 = 15

Hence,

3/4 ----- 15

 1   -----  ?

=> 15 x 4/3 = 20.

 

Hence, total number of stones in the box = 20.

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Filed Under: Probability
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