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 - 0.00005755 when expressed in powers of 10 is

A - 5755x10-5

B - 57.55x10-5

C - 5.755x10-5

D - 5.755x10-9

Answer : C

Explanation

5.755x10-5

Q 2 - (0.012+0.0012)/0.0001 + 0.01=?

A - 1.00

B - 1.02

C - 1.04

D - 1.06

Answer : A

Explanation

 (0.012+0.0012)/0.0001 + 0.01 
=(0.0001-0.000001)/0.0001 + 0.01 = 0.99 + 0.01 = 1.00

Q 3 - The greatest of 3/5, 6/5, 9/8, 7/3

A - 7/3

B - 9/8

C - 6/5

D - 3/5

Answer : A

Explanation

3/5=0.6, 6/5=1.2, 9/8=1.12 and 7/3=2.33

Q 4 - Out of a tank which is half full 5 litres of water is drawn out. The tank is now 1/3rd full. what is the capacity of tank in litres?

A - 30

B - 35

C - 25

D - 20

Answer : A

Explanation

Let X = capacity of the tank when it is full.
 (1/2) x X - 5 = (1/3) x X
 => X=30

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 - 0.9 / 0.75 = ?

A - 1.4

B - 1.8

C - 1.1

D - 1.2

Answer : D

Explanation

 
 0.9 / 0.75 = 0.90/0.75 = 90/75 = 6/5 = 1.2

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 - 6.42 - 5.42 / (8.92 + 8.9 x 2.2 + 1.12)= ?

A - .118

B - .92

C - 1.5

D - .61

Answer : A

Explanation

 
 6.42 - 5.42 / (8.92  + 8.9 x 2.2 + 1.12)= 
 {(6.4 + 5.4)(6.4 - 5.4)} / (8.9 + 1.1)2 
 (11.8 x 1)/ 102 = 11.8 /100 = .118

Q 9 - If 185 x 28 = 5180 then what is 51.8 / 18.5?

A - 2.8

B - 28

C - 280

D - 0.28

Answer : A

Explanation

 
 51.8 / 18.5 = 518/185 = 28/10 = 2.8

Q 10 - 312 Rs were divided among 60 boys and some girls in such a way that each boy got 3.6 Rs and each girl got 2.40. How many girls were there?

A - 35

B - 40

C - 60

D - 65

Answer : B

Explanation

  
 Let the girls be y 
 3.60 x 60 + 2.40 x y = 312  
 => 2.40y = 312 - 216 = 96 
 => y = 96/2.40 = 9600/ 240 = 40

aptitude_decimals.htm
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