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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

A room is half as long again as it is broad. The cost of carpeting the at Rs. 5 per sq.m is Rs. 270 and the cost of papering the four walls at Rs. 10 per sq.m is Rs. 1720. If a door and 2 windows occupy 8 sq. m, find the dimensions of the room.

A) b=6; l=18; H=6 B) b=5; l=6; H=18
C) l=6; b=18; H=15 D) l=5; b=18; H=18
 
Answer & Explanation Answer: A) b=6; l=18; H=6

Explanation:

Let breadth = x metres, length = 3x metres, height = H metres. 

Area of the floor=(Total cost of carpeting)/(Rate) = (270/5) sq.m = 54 sq.m 

x×3x2=54⇒x2=54×2⇒x=6  

So, breadth = 6 m and length =362 = 9 m.

Now, papered area = (1720/10) =  172 sq.m 

Area of 1 door and 2 windows = 8 sq.m 

Total area of 4 walls = (172 + 8) sq.m = 180 sq.m 

2×9+6H=180⇒H=6

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

33 26482
Q:

In Arun's opinion, his weight is greater than 65 kg but leas than 72 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of diferent probable weights of Arun ?

A) 55.5 kg B) 66.5 kg
C) 77.5 kg D) 88.5 kg
 
Answer & Explanation Answer: B) 66.5 kg

Explanation:

Let Arun's weight be X kg.

According to Arun, 65 < X < 72.

According to Arun's brother, 60 < X < 70.

According to Arun's mother, X < 68.

The values satisfying all the above conditions are 66 and 67.

Required average = (66 + 67) / 2 = 66.5 kg

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Filed Under: Average

21 26461
Q:

The perimeter of a square is 22 cm. Find its area (in cm2).

 

A) 60.5 B) 22.5  
C) 45   D) 30.25
 
Answer & Explanation Answer: D) 30.25

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

0 26456
Q:

In the following question, select the odd letter/letters from the given alternatives.

 

A) BFJ   B) PTX  
C) JNR   D) KOR
 
Answer & Explanation Answer: D) KOR

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

0 26420
Q:

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

 

A) Cauliflower B) Potato
C) Grapes D) Brinjal  
 
Answer & Explanation Answer: C) Grapes

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

1 26325
Q:

In the following question, select the odd letter/letters from the given alternatives.

 

A) GHJM B) PQSV
C) MNPR D) STVY
 
Answer & Explanation Answer: C) MNPR

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

1 26311
Q:

The diference of two numbers is 20% of the larger number, if the smaller number is 20, then the larger number is :

A) 15 B) 25
C) 35 D) 45
 
Answer & Explanation Answer: B) 25

Explanation:

Let the large number be x.

Then x - 20 = 20x/100

=> x - x/5 = 20  => x = 25.

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Filed Under: Percentage

51 26307
Q:

In how many ways can 4 girls and 5 boys be arranged in a row so that all the four girls are together ?

A) 18000 B) 17280
C) 17829 D) 18270
 
Answer & Explanation Answer: B) 17280

Explanation:

Let 4 girls be one unit and now there are 6 units in all.

 

They can be arranged in 6! ways.

 

In each of these arrangements 4 girls can be arranged in 4! ways. 

 

Total number of arrangements in which girls are always together = 6! x 4!= 720 x 24 = 17280

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Filed Under: Permutations and Combinations

22 26290