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

Answer : A

Explanation

356 x 0.00234

Q 2 - (0.1x0.2x0.3x0.4)/4!=?

A - 10-2

B - 10-3

C - 10-4

D - 10-5

Answer : C

Explanation

 (0.1x0.2x0.3x0.4)/4!=(1x2x3x4x10(-4))/(4*3*2*1)=10(-4)

Q 3 - √(0.169/0.064)=?

A - 13/8

B - 19/8

C - 13/5

D - 1

Answer : A

Explanation

√(0.169/0.064)=√((169/1000)/(64/1000))=√(169/64)=13/8

Q 4 - 1/9+2/9+1/3+1/6=?

A - 8/3

B - 7/6

C - 5/6

D - 7/18

Answer : C

Explanation

  1/9+2/9+1/3+1/6 =(2+4+6+3)/18 =15/18 =5/6

Q 5 - 15.60 x 0.30 = ?

A - 4.68

B - 0.458

C - 0.468

D - 0.0468

Answer : A

Explanation

 
 Number of decimal places in the product = 2 + 2 = 4. 
 1560 
  x30 
----- 
 0000 
4680x 
----- 
46800 
----- 
 ∴ 15.60 x 0.30 = 4.68 

Q 6 - 6.5 x 6.5 - 45.5 + 3.5 x 3.5 = ?

A - 6

B - 7

C - 9

D - 10

Answer : C

Explanation

 
 Given expression is a2 - 2ab + b2  where a = 6.5, b = 3.5 
 = (a-b)2 = (6.5 - 3.5)2 = 32 = 9 

Q 7 - 1.07 x 65 + 1.07 x 26 + 1.07 x 9 = ?

A - 10.73

B - 10.7

C - 107

D - 1.07

Answer : C

Explanation

 
 1.07 x 65 + 1.07 x 26 + 1.07 x 9 = 1.07 x (65 + 26 + 9) = 1.07 x 100 = 107 

Q 8 - (0.25 x 0.25 - 0.24 x 0.24) / 0.49 = ?

A - 0.0006

B - 0.49

C - 0.01

D - 0.1

Answer : C

Explanation

 
 As a2 - b2 = (a+b)(a-b)  
 ∴ (0.25 x 0.25 - 0.24 x 0.24) / 0.49 = (0.25 + 0.24)(0.25 - 0.24) / 0.49 
 = (0.49 x 0.01) / 0.49 = 0.01

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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