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 Quantitative Aptitude - Arithmetic Ability Questions

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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

32 24066
Q:

Find the number of zeroes in 129!

 

A) 31 B)  33    
C)  35   D) 37
 
Answer & Explanation Answer: A) 31

Explanation:
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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 24018
Q:

Find the circumference (in cm) of a circle of radius 7 cm.

 

A) 56 B) 44
C) 16 D) 32
 
Answer & Explanation Answer: B) 44

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

2 24015
Q:

The sum of the number of boys and girls in a school is 150. if the number of boys is x, then the number of girls becomes x% of the total number of students. The number of boys is : 

A) 60 B) 70
C) 80 D) 90
 
Answer & Explanation Answer: A) 60

Explanation:

We have : x + (x% of 150 )= 150 

=> x+(x/100)*150] = 150

=> 52x = 150  

=> x = (150*2)/5 = 60

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Filed Under: Percentage

43 23995
Q:

The banker's gain on a bill due 1 year hence at 12% per annum is Rs. 6. The true discount

is:

A) 62 B) 58
C) 47 D) 50
 
Answer & Explanation Answer: D) 50

Explanation:

T.D. =(B.G. x 100)/ (R x T)= Rs. (6 x 100)/( 12 x 1) = Rs. 50.

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Filed Under: Banker's Discount

8 23962
Q:

Find the odd one out.

 

 

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

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 23954
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

45 23932
Q:

A fort had provision of food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last, is:

A) 29/5 B) 37/4
C) 42 D) 54
 
Answer & Explanation Answer: C) 42

Explanation:

After 10 days : 150 men had food for 35 days.

 

 

 

Suppose 125 men had food for x days.

 

 

 

Now, Less men, More days (Indirect Proportion)

 

 

 

 125 : 150 :: 35 : x    =>    125 x x = 150 x 35

 

 

 

 =>

 

 

 

=> x = 42.

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Filed Under: Quantitative Aptitude - Arithmetic Ability

38 23928