Quantitative Aptitude - Arithmetic Ability Questions

Q:

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

A) 20 B) 50
C) 25 D) 30
 
Answer & Explanation Answer: D) 30

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Filed Under: Average
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Q:

The mean of marks secured by 60 students in division A of class X is 66, 45 students of division B is 62 and that of 75 students of division C is 60. Find the mean of marks of the students of three divisions of Class X.

A) 61.8 B) 62.5
C) 61.1 D) 63.9
 
Answer & Explanation Answer: B) 62.5

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Q:

Which of the following will yield a recurring decimal?

A) 21/90 B) 21/60
C) 21/30 D) 21/120
 
Answer & Explanation Answer: A) 21/90

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Filed Under: Decimal Fractions
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Q:

A, B and C can finish a job working alone in 20, 30 and 60 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to finish the remaining part of the job?

A) 60 B) 54
C) 6 D) 27
 
Answer & Explanation Answer: B) 54

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Filed Under: Time and Work
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Q:

If the selling price of an article is doubled, then its loss percentage gets converted into the equal profit percentage. What is the loss percentage?

 

A) 16.66   B) 50
C) 33.33   D) 37.5
 
Answer & Explanation Answer: C) 33.33  

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Filed Under: Profit and Loss
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Q:

What is the value of (1 + cotA)2 + (1 -­ cotA)2?

A) 2cosec2A B) 2sec2A
C) 1 -­ 2cosec2A D) 1 -­ 2sec2A
 
Answer & Explanation Answer: A) 2cosec2A

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Filed Under: Simplification
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Q:

If 2x - 3 = 3x - 5, then the numerical value of  (x - 3)2 is

A) 5 B) 1
C) -5 D) -1
 
Answer & Explanation Answer: B) 1

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Q:

The price of a Television is Rs.14000 inclusive of VAT. If the rate of VAT is 12%, find the basic price of the Television.

A) Rs.13500 B) Rs.13000
C) Rs.12500 D) Rs.12000
 
Answer & Explanation Answer: C) Rs.12500

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Filed Under: Percentage
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