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 - The fraction 36(42/1000) in the decimal form is

A - 36.42

B - 36.042

C - 364.2

D - 36.0042

Answer : B

Explanation

36(42/1000)  = 36 + 0.042 
= 36.042

Q 2 - If √14=3.74, then √(7/2)=?

A - 1.9

B - 1.87

C - 1.84

D - 1.81

Answer : B

Explanation

 √(7/2)=√((7x2)/(2x2))=√(14/4)=3.74/2=1.87

Q 3 - (0.036-0.018)/(0.0036/36)=?

A - 2

B - 6

C - 12

D - 18

Answer : D

Explanation

(0.036-0.018)/(0.036/36)=   (36/1000-18/1000)/(36/1000) x36=((36-18)/1000)/(36/1000) x36=18/36 x36=18

Q 4 - If a fraction is multiplied by itself and then divided by the reciprocal of the same fraction, the result is 729/64 , Find the fraction.

A - 5/4

B - 9/8

C - 9/4

D - 9/2

Answer : C

Explanation

(X2)/(1/x) = 729/64
 => X3 = (9/4)3
 => X = 9/4

Q 5 - If 16.7 + 12.38 - x = 10.09. What is x?

A - 17.89

B - 18.99

C - 16.98

D - 20.09

Answer : B

Explanation

 
 As 16.7 + 12.38 - x = 10.09.  
 Thus x = 16.7 + 12.38 - 10.09 
  16.7  
  12.38  
  ------  
  29.08 
 -10.09   
  ------  
  18.99  
  -----    

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 - b/a = 0.25. What is (2a-b)/(2a+b) + 2/9?

A - 4/9

B - 5/9

C - 1

D - 2

Answer : C

Explanation

 
 (2a-b)/(2a+b) + 2/9 = (2-b/a)/(2+b/a) + 2/9 = (2-1/4)/(2+1/4) + 2/9 = 7/9 + 2/9 = (7+2)/9 = 9/9 = 1 

Q 8 - .983 + .023 - 3 x .98 x .02 - 1 = ?

A - 0

B - 1

C - 1.09

D - 1.98

Answer : A

Explanation

 
 Given expression is a3 + b3 + 3ab - 1 where a - .98 and b =.02 
 ∴ .983 + .023 - 3 x .98 x .02 - 1 = (a+b)3 -1 
 = (.98 + 0.02) - 1 = 0 

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 - If a student is asked to divide a number by 3, but he multiplied it by 3 and got 29.7. What should be the correct answer?

A - 3.1

B - 3.2

C - 3.3

D - 3.4

Answer : C

Explanation

 
 3x = 29.7 => x =9.9. ∴ correct answer = 9.9 / 3 = 3.3.


aptitude_decimals.htm

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