Aptitude and Reasoning Questions

Q:

On what dates of July.2004 did Monday fall?

A) 6th,10th,21st,30th B) 12th,7th,19th,28th
C) 5th,10th,24th,17th D) 5th, 12th, 19th, 26th
 
Answer & Explanation Answer: D) 5th, 12th, 19th, 26th

Explanation:

Let us find the day on 1st July, 2004.

2000 years have 0 odd day. 3 ordinary years have 3 odd days.

Jan. Feb. March April May June July

31 + 29 + 31 + 30 + 31 + 30 + 1

= 183 days = (26 weeks + 1 day) = 1 t .

Total number of odd days = (0 + 3 + 1) odd days = 4 odd days. '

:. 1st July 2004 was 'Thursday',-,-

Thus, 1st Monday in July 2004 _as on 5th July.

Hence, during July 2004, Monday fell on 5th, 12th, 19th and 26th. .

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Filed Under: Calendar

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Q:

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years, The ratio of the number of boys to the number of girls in the class is :

A) 1 : 2 B) 2 : 3
C) 3 : 4 D) 4 : 5
 
Answer & Explanation Answer: B) 2 : 3

Explanation:

 Let the ratio be k : 1. Then,

k * 16.4 + 1 * 15.4 = (k + 1) * 15.8

<=> (16.4 - 15.8) k = (15.8 - 15.4)  <=> k =  0.4/0.6 = 2/3.

Required ratio  = 2/3 : 1 = 2 : 3.

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Filed Under: Average

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Q:

If 8 men can reap 80 hectares in 24 days , then how many hectares can 36 men reap in 30 days?

A) 350 B) 400
C) 425 D) 450
 
Answer & Explanation Answer: D) 450

Explanation:

Let the required no of hectares be x. Then 

More men, More hectares      (Direct proportion)

More days, More hectares      (Direct proportion)

 Men8 : 36Days24:30 80 :x

=> ( 8 * 24 * x) = (36 * 30 * 80)

=>  x= 450

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Filed Under: Chain Rule

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Q:

If a mirror is placed on the line MN, then which is the right image of the given figure?

 

A) 1 B) 2
C) None D) 4
 
Answer & Explanation Answer: A) 1

Explanation:
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Filed Under: Image Analysis
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Q:

The ages of Krish and Vaibhav are in the proportion of 3 : 5. After 9 years, the proportion of their ages will be 3 : 4. Then the current age of Vaibhav is:

A) 10 B) 13
C) 15 D) 18
 
Answer & Explanation Answer: C) 15

Explanation:

Krish’s age = 3A and Vaibhav’s age = 5A


(3A+9)/(5A+9) = 3/4


=> 4 (3A + 9) = 3 (5A + 9)


=> A = 3


Therefore, Vaibhav’s age = 15 years.

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Filed Under: Problems on Ages

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Q:

Is Arun taller than Sachin ? 

I. Dinesh is of the same height as Arun and Sachin. 

II. Sachin is not shorter than Dinesh. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: A) If the data in statement I alone are sufficient to answer the question

Explanation:

From statement I, we can conclude that Dinesh. Arun and Sachin are of the same height So. Arun is not taller than Sachin. Thus, only statement I is sufficient to answer the question. .

 

 

 

 

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Filed Under: Data Sufficiency

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Q:

The H.C.F and L.C.M of two numbers are  84 and 21 respectively.  If the ratio of the two numbers is 1 : 4 , then the larger of the two numbers is 

A) 12 B) 48
C) 84 D) 108
 
Answer & Explanation Answer: C) 84

Explanation:

Let the numbers be x and 4x. Then,  x×4x=84×21  x2=84×214 x=21 

Hence Larger Number = 4x = 84

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Filed Under: HCF and LCM

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Q:

Tennis is to Sport as Chemistry is to

A) Biology B) Physics
C) Science D) Subject
 
Answer & Explanation Answer: C) Science

Explanation:

As Tennis is a kind of Sport, similarly, Chemistry is a kind of science.

 

Hence, Tennis : Sport :: Chemistry : Science.

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Filed Under: Analogy
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