Aptitude - Ratios Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to Ratios. 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 - If three numbers are in the ratio 3:7:11 and double the sum is 84, then the ratio of squares of the numbers is
A - 9:25:49
B - 9:49:121
C - 16:25:36
D - 16:25:49
Explanation
Let the numbers are 3x:7x:11x
It is given that 2(3x+7x+11x) = 84
 => x=2
Ratio 6:14:22 or 3:7:11
 Their squares 9:49:121

Q 2 - Two numbers are respectively 80% and 60% more than a third number. What is the ratio between two numbers?
A - 7:8
B - 8:9
C - 9:8
D - 4:3
Explanation
Let the third number be x
=> The first and second number becomes 1.8x and 1.6x
Their ratio will be 1.8x/1.6x=1.8/1.6=9/8 = 9:8

Q 3 - If A=(1/3)B and B=(1/2)C, then A:B:C =? 
A - 1:3:6
B - 2:3:6
C - 3:2:6
D - 3:1:2
Explanation
A/B = 1/3 and B/C =1/2
∴ A :B = 1 :3 and B :C = 1:2 = 3:6
∴ A :B :C = 1 :3:6

Q 4 - If 7:x ::17.5 :22.5 , then x=? 
A - 5.5
B - 7.5
C - 6
D - 9
Explanation
X * 17.5 =7*22.5 
=>  X= 7*22.5/17.5 
= 7*225/175 =9.

Q 5 - What no. must be added to every term of 3:5 to make the proportion 5:6 ?
A - 6
B - 7
C - 12
D - 13
Explanation
Let the number to be included be X , Then ,
(3+x)/(5+x) = 5/6 
=> 6 (3+x)= 5 (5+x) 
=>x=(25-18) = 7. 
Henceforth, the no. to be included is 7.

Q 6 - If 32 understudies In a class are females and the proportion of females to guys understudy is 16:9 , then what % of the class is females ?
A - 32%
B - 36%
C - 56.25%
D - 64%
Explanation
Let the females be16x and males 9x .
Then, 16 x = 32  
=> x=2
 So, there are 32 females and 18 males in the class. 
 Percentage of females = {32/50*100)% = 64 %

Q 7 - What ought to be added to each of the four numbers 6, 14, 18, 38 to make them corresponding?
A - 1
B - 2
C - 3
D - 4
Explanation
Let the number to be added be x. Then,
6+X/14+x=  18+x/38+x
=>  (6+x) (38+x)= (14+ x) (18 +x)
=>  228 +44x+x<sup>2</sup> = 252+32x+x<sup>2</sup>
= 12x=24 
=>  x=2 .
∴ the required number is 2.

Q 8 - If a surpasses B by 40 % and B is not as much as C by 20 %, then A:C =? 
A - 3:1
B - 3:2
C - 26:25
D - 28:25
Explanation
B= 80% of C= 80/100*C= 4c/5 and 
A= 140% of B=(140b/100) =7B/5
 A= 7b/5= 7/5*4C/5 =28C/25
=>A/C =28/25
 ∴ A: C = 28:25

Q 9 - The proportion of salary of An and B is 5:3 and that of their use is 9:5. On the off chance that they spare Rs. 2600 and Rs. 1800, then their livelihoods are: 
A - 9000, 5400 
B - 10000, 6000 
C - 6000, 3600 
D - 8000, 4800 
Explanation
Let the income of A and B be Rs 5x and Rs 3x respectively and let their expenditure be Rs. 9y and 5y respectively. Then,
5x- 9y =2600    ...(i)   and 3x-5y =1800  ...(ii)
On multiplying (ii) by 9 and (i) by 5 and subtracting, we get
 2x = 3200 
=> x = 1600.
 ∴ A income = (5*1600)= 8000, B income = (3*1600)= 4800

Q 10 - Two equivalent glasses are 1/3 and 1/4 loaded with milk. They are then topped off with the water and the substances are blended in a tumbler. The milk's proportion and water in the tumbler is: 
A - 7:5 
B - 7:17 
C - 3:7 
D - 11:23
Explanation
First glass contains milk =1/3, water=2/3.
Second contains milk =1/4,water=3/4.
New tumbler contains milk=(1/3+1/4)=7/12,water=(2/3+3/4)=17/12.
Ratio of milk and water in it =7/12:7/12=7:17.


    87 Lectures 
     22.5 hours 

 Programming Line
 Print
 Add Notes
 Bookmark this page