Quiz

Question:

The ages of Kamaraj and Deenan differ by 16 years, Six years ago, Mohan’s age was thrice as that of Kamaraj’s find their present ages of Mohan?

Options:
A.14
B.16
C.20
D.30
E.None of these
Answer: Option D
 -  Let Kamaraj's age = X years

So, Mohan's age = (X + 16) years

Also, 3(X - 6) = X + 16 - 6 or, X = 14

Kamaraj's age = 14 years

and, Mohan's age = 14 + 16 = 30 years

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More Questions on This Topic :

Question 1.

Sushil was thrice as old as Snehal 6 years back. Sushil will be 5/3 times as old as Snehal 6 years hence. How old is Snehal today?

Options:
  1.    10
  2.    11
  3.    12
  4.    13
  5.    None of these
Answer: Option C
 -  Let Snehal's age 6 years back = X

Then, Sushil's age 6 years back = 32.
Then 5 (X + 6 + 6) = (3X + 6 + 6)     3    
5(X + 12) = 3 (3X + 12)

4X = 24

X=6

Snehal's age today = (X + 6) years = 12 years
Question 2.

The total of the ages of Jayant, Prem and Saransh is 93 years. Ten years ago, the ratio of their ages was 2 : 3 : 4. What is the present age of Saransh?

Options:
  1.    35
  2.    36
  3.    37
  4.    38
  5.    None of these
Answer: Option D
 -  Let the ages of Jayant, Prem and Saransh 10 years ago be 2x, 3x and 4x years respectively

Then, (2x + 10) + (3x + 10) + (4x + 10) = 93

9x = 63

x = 7

Saransh's present age = (4X + 10) = 38 years
Question 3.

A father is four times as old as his son today. After 20 years, he would be just twice as old. At the time of birth of his son, how much old must the father be?

Options:
  1.    28
  2.    30
  3.    32
  4.    35
  5.    None of these
Answer: Option B
 -  Let the ages of son and father today by 'x' and '4x' years respectively.

4x + 20 = 2 (x+20) ---> As per information

x = 10 years ==> 4x = 40 years

At the time of birth of his son, father must be 40 - 10 = 30 old
Question 4.

Hitesh is 40 years old and Ronnie is 60 years old. How many years ago was the ratio of their ages 3:5?

Options:
  1.    6
  2.    8
  3.    9
  4.    10
  5.    None of these
Answer: Option D
 -  Suppose, the ratio was 3 : 5, X years ago

Then,        5 (40 - X) = 3(60 - X)            2X = 20

X = 10
Question 5.

15 years hence, Rohit will be just four times as old as he was 15 years ago, How old is Rohit at present?

Options:
  1.    20
  2.    25
  3.    30
  4.    35
  5.    None of these
Answer: Option B
 -  Let the present age of Rohit be X years

Then, given: X+15 = 4(X – 15)

X = 25
Question 6.

The present ages of three persons are in proportions 4:7:9. Eight years ago, the sum of their ages was 56. Find their present ages (in years)?

Options:
  1.    16 years, 28 years and 36 years
  2.    8 years, 14 years and 18 years
  3.    12 years, 21 years and 27 years
  4.    20 years, 35 years and 45 years
  5.    None of these
Answer: Option A
 -  Let their present ages be 4X, 7X and 9X years respectively

Then, (4X - 8) + (7X - 8) + (9X - 8) = 56

20 X = 80

X = 4

Their present ages are 16 years, 28 years and 36 years respectively