Aptitude - Decimals & Fractions Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Decimals and Fractions. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - If 4.5x=0.12y, then the value of (y-x)/(y+x) is

A - 74/77

B - 73/77

C - 75/77

D - 72/77

Answer : B

Explanation

(y-x)/(y+x)=(1-x/y)/(1+x/y)
 =(1-2/75)/(1+2/75) 
=73/77

Q 2 - How many digits are there to the right of decimal in the product of 45.875x323.87?

A - 2

B - 4

C - 5

D - 6

Answer : C

Explanation

 5

Q 3 - A man spends 1/3rd of his salary on household expenses, 1/3th for rent, 1/6th for travel expenses; the man deposits the rest in a bank. If his monthly deposits in the bank amount Rs.1000, what is his monthly salary?

A - 4000

B - 5000

C - 6000

D - 7000

Answer : C

Explanation

 Let the Total amt is X.
 Therefore: X-(X/3+X/3+X/6) = 1000
 X= Rs.6000

Q 4 - Find the sum of the largest and the smallest fraction in 3/5, 6/5, 9/8, 7/3

A - 2.53

B - 2.63

C - 2.83

D - 2.93

Answer : D

Explanation

3/5=0.6, 6/5=1.2, 9/8=1.12 and 7/3=2.33
 => sum of largest & smallest fraction is 2.33 + 0.6=2.93

Q 5 - What is the value of 3.14 x 106

A - 314

B - 3140

C - 3140000

D - 31400

Answer : C

Explanation

 
 3.14 x 106 = 3.14 x 102 x 104  
 = 314 x 104 = 3140000  

Q 6 - 2.43 x 2.43 + 2.3x7.57x2 + 7.57x7.57 = ?

A - 10

B - 100

C - 101.89

D - 200.59

Answer : B

Explanation

 
 Given expression is a2 + 2ab + b2  where a = 2.43, b = 7.57 
 = (a+b)2 = (2.43 + 7.57)2 = 102 = 100 

Q 7 - .000033 / 0.11 = ?

A - 0.003

B - 0.03

C - 0.0003

D - .3

Answer : C

Explanation

 
 .000033 / 0.11 = .0033/11 = .0003 

Q 8 - (2.33 - 0.027) / (2.32 + 0.69 + 0.09)= ?

A - 2.6

B - 2

C - 2.33

D - 2.8

Answer : B

Explanation

 
 As a3 - b3 = (a-b)(a2-ab + b2) 
 Thus (a3 - b3) / (a2-ab + b2)  = a - b  
 ∴ (2.33 - 0.027) / (2.32 + 0.69 + 0.09) 
 = (2.33 - 0.033) / (2.32 + 2.3 x 0.3 + 0.32) = 2.3 - 0.3 = 2 

Q 9 - 1/0.04 = ?

A - 1/40

B - 2/5

C - 2.5

D - 25

Answer : D

Explanation

 
 1/0.04 = 100/4 = 25 

Q 10 - What will the number if its square is equal to the difference of the squares of 75.15 and 60.12?

A - 45.09

B - 46.09

C - 47.09

D - 48.09

Answer : A

Explanation

 
 let the number be x  
 => x2 = 75.152 - 60.122 = (75.15 +60.12)(75.15-60.12) = 135.27 x 15.03 
 = 9 x 15.03 x 15.03 
 = > x = 3 x 15.03 = 45.09 


aptitude_decimals.htm

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