Ratio and Proportion - Quantitative Aptitude (MCQ) questions

1)   How to divide 3395 in ratio of 42 : 32 : 23?
- Published on 17 Mar 17

a. 1470, 1120 and 805
b. 1550, 1235 and 610
c. 1245, 1150 and 1000
d. 1764, 1022 and 529
Answer  Explanation 

ANSWER: 1470, 1120 and 805

Explanation:
ratio and proportion


2)   a:b = 3:7 and b:c = 9:5. What is a:b:c?
- Published on 15 Mar 17

a. 3:15:5
b. 21:16:45
c. 3:7:5
d. 27: 63:35
Answer  Explanation 

ANSWER: 27: 63:35

Explanation:
ratio and proportion


3)   Income ratio of Ramesh and Suresh is 5:6. Their spending ratio is 7:9. Ramesh saves 4000 and Suresh saves 3000. Income and spending respectively of Ramesh and Suresh are
- Published on 15 Mar 17

a. Ramesh - 25000, 21000; Suresh – 30000, 27000
b. Ramesh - 36000, 32000; Suresh – 30000, 27000
c. Ramesh - 30000, 27000; Suresh – 36000, 32000
d. None of the above
Answer  Explanation 

ANSWER: Ramesh - 25000, 21000; Suresh – 30000, 27000

Explanation:
ratio and proportion


4)   10/13 = 11/28 = 21/11 = 12/11 = K. What is K?
- Published on 15 Mar 17

a. 6/7
b. 12/13
c. 10/11
d. 59/63
Answer  Explanation 

ANSWER: 6/7

Explanation:
ratio and proportion


5)   Find the mean proportional between 7 and 63?
- Published on 10 Mar 17

a. 35
b. 21
c. 27
d. 30
Answer  Explanation 

ANSWER: 21

Explanation:
ratio and proportion


6)   Find A:B:C:D when A:B = 2:3 ; B:C = 7:9 ; C:D = 5:7
- Published on 10 Mar 17

a. 70 : 105 : 135 : 189
b. 105 : 115 : 236 :189
c. 70 : 124 : 155 : 201
d. 12 : 78 : 256 : 189
Answer  Explanation 

ANSWER: 70 : 105 : 135 : 189

Explanation:
ratio and proportion

ratio and proportion


7)   What is 4th proportional in 9, 13 and 153?
- Published on 10 Mar 17

a. 251
b. 181
c. 175
d. 221
Answer  Explanation 

ANSWER: 221

Explanation:
ratio and proportion


8)   Ratio of two numbers is 3:8. On adding 5 to both numbers, the ratio becomes 2:5. Which is the smaller number out of the two?
- Published on 10 Mar 17

a. 64
b. 120
c. 45
d. 105
Answer  Explanation 

ANSWER: 45

Explanation:
ratio and proportion


9)   The 3rd proportional to 18 and 54 is?
- Published on 10 Mar 17

a. 144
b. 72
c. 162
d. 972
Answer  Explanation 

ANSWER: 162

Explanation:
ratio and proportion


10)   285 is summation of 3 numbers. Ratio between 2nd and 3rd numbers is 6:5. Ratio between 1st and 2nd numbers is 3:7. The 3rd number is?
- Published on 05 Mar 17

a. 135
b. 150
c. 124
d. 105
Answer  Explanation 

ANSWER: 105

Explanation:


Values of 2nd number = 7 and 6 (They are not the same)

Make the values of 2nd number same as follows -

Multiply 3:7 up and down with 6 as shown



Multiply 6:5 up and down with 7 as shown



Values of 2nd number are now same = 42

1st number : 2nd number = 18 : 42

2nd number : 3rd number = 42 : 35

1st number : 2nd number : 3rd number = 18 : 42 : 35

Common factor helps in finding actual values easily

So, take ‘A’ as common factor.

So now the 3 numbers are 18A, 42A and 35A

18A + 42A + 35A = 285

A = 3

3rd number = 35A = 35 x 3 = 105


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