Aptitude - Questions & Answers

Aptitude - Ratios Online Quiz

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 - In a mixture of 60 litres, the ratio of milk and water is 5:1. How much water must be added to this mixture so that the ratio of milk and water becomes 2:3?

Answer : C

Explanation

Let water is x
5x:x = milk:water
50 :10 = 5x:x (since 60litres )
Now  50/(10+x)=2/3 => x=65 litres

Q 2 - Rayudu has coins of the denomination of Re.1, Rs.2 and Rs.5 in the ratio 6:2:1.The total worth of the coins is Rs.50.Find the number of Re.1 coins that he has

Answer : C

Explanation

Coins are 6x:2x:x
It is given that 6x+2*2x+5*x=60
=> x=4
6x=6*4=24
Re.1 coins are 24.

Q 3 - If A:B = 2:3 , B:C = 4:5 and C:D = 6:7 , Then A:D =?

Answer : C

Explanation

A/D = (A/B* B/C * C/D ) = (2/3 * 4/5 * 6/7 ) = 16/35 
Thus A:D =16:35

Q 4 - If 7:x ::17.5 :22.5 , then x=?

Answer : D

Explanation

X * 17.5 =7*22.5 
=>  X= 7*22.5/17.5 
= 7*225/175 =9.

Q 5 - If 20 % of (p +q )=50 % of (p-q ), then p:q =?

Answer : C

Explanation

20/100* (P+Q) = 50/100* (P-Q)
=> 20 * (P+Q)=50 *(P-Q)
=> 20P +20Q = 50P-50Q
=> 30P=70Q 
=> P/Q=70/30=7/3
=> P:Q = 7:3.

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 ?

Answer : D

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 - At the point when 20% of a no. is added to another no., the no. increment by half. What is the proportion between the first and the second no?

A - 3:2

B - 2:3

C - 5:2

D - cannot be resolved

Answer : C

Explanation

Let the numbers be x and y. Then,
Y+ 20x/100 = (150/100)y
=> x/5 ={ (3/2)y-y}= y/2
=> 2x-5y
=> x/y=5/2 
=> x:y =5:2

Q 8 - Rs. 355 were separated among A, B,C in a manner that A had Rs. 20 more than B and C had Rs.15 all the more than A . What amount was C offer?

Answer : C

Explanation

Suppose B gets Rs. X. Then, A gets Rs. (x+20) and C gets Rs. (x+35)
∴ x+20+x+x+35= 355 => 3x=300 
=>x=100
 ∴ C share= (100+35) =135.

Q 9 - The pay of A,B and C together add up to rs. 333. If they burn through 80% , 85%, 75% of their livelihoods , their sparing are as 7:6:9 . The pay of B is:

Answer : D

Explanation

Let their savings   be Rs 7x, Rs 6x and Rs 9x respectively.
  A+B+C=333 ?(i)
20/100 A=7x 
=>A=35x,15/100B=6x
=>B=40x,25/100C=9x
=>C=36x.
          ∴ 35x+40x+36x=333 
=> 111x =333  
=> x=3
           ∴B salary = (40*3)= 120.

Q 10 - Two vessels A and B contain drain and water blended in the proportion 5:3 and 2:3. At the point when these blends are blended to frame another blend containing half drain and half water, they must be taken in the proportion

Answer : C

Explanation

Let the required ratio be x:1,
Milk in x liters of A=(x*5/8) liters=5x/8 liters,Water=3x/8 liters.
Milk in 1 litre of B=(1*2/5) litre=2/5 litre, Water =3/5 liters.
∴ (5x/8+2/5) / (3x/8+3/5) = 1/1 
=>(5x/8+2/5)=(3x/8+3/5)
=> 2x/8=1/5 
=>x=4/5.
Required ratio= 4/5:1=4:5.

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