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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.

Q 1 - 0.00005755 when expressed in powers of 10 is

Answer : C

Explanation

5.755x10^-5

Q 2 - 0.000055/0.22=?

Answer : C

Explanation

 0.000055/0.22=55x10^-6/22x10^-2=2.5x10^-4=0.0025

Q 3 - Express 0.888 in fractional form

Answer : C

Explanation

0.888...= 8/9

Q 4 - How many digits are there to the right of decimal in the product of 32.182x36.42?

Answer : B

Explanation

 32.182x36.42 = 32182/1000 x 3642/100 =32182x3642x10^-5
 =&t; 5 decimals

Q 5 - 16.02 x 0.001 = ?

Answer : C

Explanation

 
 1602 x 1 = 1602 
 => 16.02 x 0.001 = .01602 (considering 5 places of decimal)

Q 6 - What is the value of 0.04 x 0.0162?

Answer : B

Explanation

 
 0.04 x 0.0162 = 4/100 x 162/10000 = 648 /100 x 1/10⁴ = 6.48 x 10^-4

Q 7 - If 0.13 / x² = 13. What is x?

Answer : C

Explanation

   
 0.13 / x² = 13 
 => 13x² = 0.13 
 => x² = 0.13/13 = 13/100 x 1/13 = 1/100 
 => x = 1/10 = .1

Q 8 - (0.73³ + 0.27³) / (0.73² + 0.27² - 0.73 x 0.27)= ?

Answer : A

Explanation

 As a³ + b³ = (a+b)(a²-ab + b²)    
 Thus (a³ + b³) / (a²-ab + b²)  = a + b  
 ∴ (0.73³ + 0.27³) / (0.73² + 0.27² - 0.73 x 0.27) = 0.73 + 0.27 = 1

Q 9 - 3.87878787 - 2.595959 = ?

Answer : D

Explanation

 
 3.878787 - 2.595959 = 3 + 87/99 - 2 - 59/99 = 1 + 28/99 = 1.282828

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

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