Quantitative Aptitude - Arithmetic Ability Questions

Q:

Directions: What value should come in place of question mark (?) in the following question?

69÷3×0.85+24.5-13.8=?

A) 31.75  B) 30.25 
C) 28.95  D) 35.25 
 
Answer & Explanation Answer: B) 30.25 

Explanation:

= (69x85/3x100) + 10.7

= 30.25.

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Q:

Consider the figure shown below and choose the correct option for the length of MN.

 

A) d2-r1-r22 B) d2+r1-r22
C) d2-r1-r22 D) d+r1-r22
 
Answer & Explanation Answer: A) d2-r1-r22

Explanation:
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Q:

Find the wrong number in the given number series?

10, 21, 54, 109, 189

A) 189 B) 109
C) 54 D) 21
 
Answer & Explanation Answer: A) 189

Explanation:

The given number series is 10, 21, 54, 109, 189

The series follows a pattern that

10 + 11 = 21

21 + 33 = 54

54 + 55 = 109

109 + 77 = 186

 

Hence the wrong number in the given number series is 189.

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Q:

Simplify : (25)32

 

A) 625 B) 15625
C) 125 D) √125
 
Answer & Explanation Answer: C) 125

Explanation:
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Q:

A milkman purchases the milk at Rs. x per litre and sells it at Rs. 2x per litre still he mixes 2 litres water with every 6 litres of pure milk. What is the profit percentage?

A) 116% B) 166.66%
C) 60% D) 100%
 
Answer & Explanation Answer: B) 166.66%

Explanation:

Let the cost price of 1-liter pure milk be Re.1, then 

 6 liters (milk)   C.P = Rs. 62 liters (water)  C.P = Rs. 0CP = Rs.6 only

 

8 litre mixture  =>

SP =>  8 x 2 = Rs. 16

 

Profit % = 16 - 66x100 = 10006 = 166.66%

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Q:

In an election only two candidates contested 20% of the voters did not vote and 120 votes were declared as invalid. The winner got 200 votes more than his opponent  thus he secured 41% votes of the total voters on the voter list. Percentage votes of the defeated candidate out of the total votes casted is:

A) 47.5% B) 41%
C) 38% D) 45%
 
Answer & Explanation Answer: D) 45%

Explanation:

Let there be x voters and k votes goes to loser then 

 

      0.8x - 120 = k + (k + 200)

 

         k+200 = 0.41x

 

 => k = 1440

 

and  (k + 200) =1640

 

Therefore  1440/3200 x 100 = 45%

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Q:

A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along the edges?

A) 30 B) 40
C) 50 D) 60
 
Answer & Explanation Answer: A) 30

Explanation:

Let the side of the square(ABCD) be x meters.

 

Then, AB + BC = 2x metres.

 

AC = 2x = (1.41x) m.

 

Saving on 2x metres = (0.59x) m.

 

Saving % =0.59x2x*100 = 30% (approx)

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Q:

Find the odd man out of the following series?

6, 8, 5, 10, 4, 14

A) 8 B) 10
C) 4 D) 5
 
Answer & Explanation Answer: C) 4

Explanation:

The given number series is 6, 8, 5, 10, 4, 14

6

6 + 2 = 8

8 - 3 = 5

5 + 5 = 10

10 - 7 = 3

3 + 11 = 14

...

 

Hence, the odd man in the given series is 4.

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