Quantitative Aptitude - Arithmetic Ability Questions

Q:

The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?

A) X– (1/2)   B) X – (1/19)  
C) X – (19/10)   D) X – (19/9)
 
Answer & Explanation Answer: C) X – (19/10)  

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Filed Under: Average
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Q:

If (4x - 3) - (2x + 1) = 4, then the value of x is

A) 0 B) 1
C) 2 D) 3
 
Answer & Explanation Answer: C) 2

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Q:

The sum of a number and 4 times its reciprocal is 5. What is the number?

A) 4 B) 5
C) 6 D) 7
 
Answer & Explanation Answer: A) 4

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Q:

Find the odd word/letters/number from the given alternatives.

A) Tabla B) Tanpura
C) Sarod D) Sitar
 
Answer & Explanation Answer: A) Tabla

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Filed Under: Odd Man Out
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Q:

If 2x + 3(5-2x) > 2 - 3x < 2x - x/3, then x can take which of the following values?

A) 0 B) -2
C) -4 D) 2
 
Answer & Explanation Answer: D) 2

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Q:

What is the third proportional to 9 and 15?

A) 30 B) 27
C) 36 D) 25
 
Answer & Explanation Answer: D) 25

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Filed Under: Ratios and Proportions
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Q:

If a -­ b = 3 and ab =28, then a3 - b3 is

A) 279 B) 387
C) 513 D) 91
 
Answer & Explanation Answer: A) 279

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Q:

If secA -­ tanA = x, then the value of x is

A) √[(1 + sinA)/(1 ­- sinA)] B) √[(1­-sinA)/(1+sinA)]
C) (1-­sinA)/(1+sinA) D) (1 + sinA)/(1 -­ sinA)
 
Answer & Explanation Answer: B) √[(1­-sinA)/(1+sinA)]

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Filed Under: Simplification
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