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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

If Deepesh had walked 20 km/h faster he woulh have saved 1 hour in the distance of 60km. what is the usual speed of Deepesh?

A) 100 B) 120
C) 150 D) None of these
 
Answer & Explanation Answer: A) 100

Explanation:

Let the original speed  be x km/h, then

600x-600x+20=1 

 

⇒600x+20-xxx+20=1  

 

⇒x2+120x-12000=0

 

⇒x-120x-100=0

 

Therefore,  original speed = 100km/h

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Filed Under: Time and Distance

32 25462
Q:

Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?

A) 15 minutes B) 20 minutes
C) 18 minutes D) 22 minutes
 
Answer & Explanation Answer: B) 20 minutes

Explanation:

Let the total distance to be covered is 84 kms.
Time taken to cover the distance without stoppage = 84/42 hrs = 2 hrs
Time taken to cover the distance with stoppage = 84/28 = 3 hrs.
Thus, he takes 60 minutes to cover the same distance with stoppage.
Therefore, in 1 hour he stops for 20 minutes.

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Filed Under: Average
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Analyst , Bank Clerk , Bank PO

27 25383
Q:

Direction: What should come in the place of question mark (?) in the following number series?

2, 3, 6, 15, 45, ?

A) 90 B) 135
C) 157.5 D) 200
 
Answer & Explanation Answer: C) 157.5

Explanation:

The pattern followed is *1.5 , * 2 , *2.5 , *3 , *3.5

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Filed Under: Numbers
Exam Prep: AIEEE , Bank Exams , GATE

0 25364
Q:

If the manufacturer gains 10 %, the wholesale dealer 15 % and the retailer 25 %, then find the cost of production of a table if the retail price was Rs 1265

A) Rs. 750 B) Rs. 800
C) Rs. 850 D) Rs. 900
 
Answer & Explanation Answer: B) Rs. 800

Explanation:

Let the cost of Production = Rs. P

Then, as per question,

 

⇒125100×115100×110100×P=1265

 

=> P=800

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Filed Under: Profit and Loss

71 25340
Q:

If side of a square is increased by 60%, then what will be the percentage increase in its area?

 

 

A) 156 B) 120
C) 126 D) 132
 
Answer & Explanation Answer: A) 156

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

1 25338
Q:

In the following question, select the odd word pair from the given alternatives.

 

 

 

A) Cup – Tea B) Jug – Water
C) Bowl – Curd D) Pen – Butter
 
Answer & Explanation Answer: D) Pen – Butter

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

0 25333
Q:

A vessel is filled with liquid, 3 parts of which are water and 5 parts of syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

A) 1/3 B) 1/4
C) 1/5 D) 1/7
 
Answer & Explanation Answer: C) 1/5

Explanation:

Suppose the vessel initially contains 8 litres of liquid.

 

Let x litres of this liquid be replaced with water.
Quantity of water in new mixture =  3-3x8+xlitres.

 

Quantity of syrup in new mixture =  5-5x8 litres.

 

  3-3x8+x=5-5x8

 

=>   5x + 24 = 40 - 5x 

 

=>   10x = 16    => x = 8/5

 

So, part of the mixture replaced = 85×18 = 1/5.

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Filed Under: Alligation or Mixture

159 25330
Q:

A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

A) 4 B) 9
C) 12 D) 49
 
Answer & Explanation Answer: B) 9

Explanation:

Let the required number of revolutions made by larger wheel be x.

 

Then, More cogs, Less revolutions (Indirect Proportion)

 

  14 : 6 :: 21 : x => 14 x x = 6 x 21

 

x=6*21/14  =>  x=9

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Filed Under: Chain Rule

20 25278