Aptitude and Reasoning Questions

Q:

There are four prime numbers written in ascending order of magnitude. The product of the first three is 385 and of the last three is 1001. Find the fourth number ?

A) 17 B) 19
C) 13 D) 11
 
Answer & Explanation Answer: C) 13

Explanation:

(385/1001) = 5/13

First Number is 5

=> Fourth number is 13 

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Filed Under: Problems on Numbers
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Q:

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

i. Latitude
ii. Longitude
iii. Laugh
iv. Latent

A)  iii, ii, i, iv B) iv, iii, i, ii
C)  iv, i, iii, ii D) iv, i, ii, iii
 
Answer & Explanation Answer: C)  iv, i, iii, ii

Explanation:
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Filed Under: Logical Sequence of Words
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Q:

Rakesh scored more than Raju

Ravi scored less than Rakesh

Raju scored more than Ravi

Ranga score more than Raju but less than Rakesh

Then who is the top scorrer among them ?

A) Ranga B) Raju
C) Rakesh D) Ravi
 
Answer & Explanation Answer: C) Rakesh

Explanation:

1. Rakesh

2. Ranga

3. Raju

4. Ravi

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Filed Under: Data Sufficiency
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Q:

A cow s tethered in the middle of a field with a 14feet long rope.If the cow grazes 100 sq feet per day, then approximately what time will be taken by the cow to graze the whole field?

A) 616 B) 716
C) 816 D) 516
 
Answer & Explanation Answer: A) 616

Explanation:

area of the field grazed = (22/7) * 14 * 14 = 616 sq feet

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Filed Under: Area
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Q:

Select the number missing from the given series.

 

15, 20, 18, 23, ?, 26, 24

 

A) 21 B) 28
C) 30 D) 24
 
Answer & Explanation Answer: A) 21

Explanation:
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Filed Under: Number Series
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Q:

A milkman has 20 liters of milk. If he mixes 5 liters of water, which is freely available, in 20 liters of pure milk. If the cost of pure milk is Rs. 18 per litre, then the profit of the milkman, when he sells all the mixture at  cost price, is:

A) 20% B) 25%
C) 33.33% D) 18%
 
Answer & Explanation Answer: B) 25%

Explanation:

When the water is freely available and all the water is sold at the price of the milk, then the water gives the profit on the cost of 20 litres of milk.

 

  Since,    the profit % = ProfitCostPricex100

Therefore, profit percentage = 520x100  = 25%

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Filed Under: Profit and Loss
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Q:

Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is  ?

A) 16/19 B) 1
C) 3/2 D) 17/20
 
Answer & Explanation Answer: D) 17/20

Explanation:

n(S) = 20
n(Even no) = 10 = n(E)
n(Prime no) = 8 = n(P)
P(E U P) = 10/20 + 8/20 - 1/20 = 17/20

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Filed Under: Probability
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Q:

In a 40 litre mixture of alcohol & water, the ratio of alcohol and water is 5 : 3. If 20% of this mixture is taken out and the same amount of water is added then what will be the ratio of alcohol and water in final mixture?

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

Explanation:

Quantity of alohol in the mixture = 40 x 5/8 = 25 lit

Quantity of water = 40 - 25 = 15 lit

According to question,

Required ratio = 20 - 40 x 20100 x 5815 - 40 x 20100 x 38 + 40 x 20100 = 2015 - 3 + 8 = 1 : 1

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Filed Under: Alligation or Mixture
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