Aptitude - Decimals & Fractions Online Quiz

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 - (?-0.22)/3.2=3.2

A - 10.46

B - 2.56

C - 7.24

D - 10.02

Answer : A

Explanation

(x-0.22)/3.2=3.2 
=> x-0.22=10.24 
=> x=10.46

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 - Which of the following fractions is greater than 1/3 and less than 5/6.

A - 4/3

B - 2/7

C - 3/2

D - 2/3

Answer : D

Explanation

As 1/3=0.33, 5/6=0.83, 4/3=1.33, 2/7=0.28, 3/2=1.5 and 2/3=0.67 
 Clearly, 0.67 lies between 0.83 and 0. 33.

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 - 3 x 0.3 x 0.03 x 0.003 x 30 = ?

A - 0.0000243

B - 0.000243

C - 0.00243

D - 0.0243

Answer : C

Explanation

  
 Number of decimal places in the product = 1 + 2 + 3 = 6.  
 3 x 3 x 3 x 3 = 2430 
 ∴ 3 x 0.3 x 0.03 x 0.003 x 30 = .00243

Q 6 - 0.0169 / 0.013 = ?

A - 0.13

B - 0.013

C - 1.3

D - 3

Answer : D

Explanation

 
 0.0169 / 0.013 = 0.0169/ 0.0130 = 169/130 = 13/10 = 1.3

Q 7 - (0.352 - 0.032) / 0.19 = ?

A - 0.32

B - 0.48

C - 0.64

D - 0.76

Answer : C

Explanation

  
 As a2 - b2 = (a+b)(a-b) 
 ∴ (0.352 - 0.032) / 0.19 = (0.35 + 0.03)(0.35 - 0.03) / 0.19 
 = (0.38 x 0.32) / 0.19 = (38 x 0.32) / 19 = 2 x .32 = .64

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 - Which of the following is same as 54.327 x 357.2 x .0057?

A - 5.4327 x 3.572 x 5.7

B - 5.4327 x 3.572 x .57

C - 54327 x 3572 x .0000057

D - 543.27 x 35.72 x .0057

Answer : A

Explanation

 
 As sum of decimal places in product is 8 and in option A is also 8.

Q 10 - If 1 litre of water weighs 1 kg. How many cubic millimeters of water will weigh .1 gm?

A - .1

B - 1

C - 10

D - 100

Answer : D

Explanation

   
  1000 gm is weight of 1000 cubic millimeter of water. 
 => 1 gm is weight of 1 cubic centimeter = 1000 cubic millimeters of water 
 1/10 gm is weight of 1000 x 1/10 = 100 cubic millimeter of water.

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