Important for :

1

2

E

Since Monika and Neha are twins so their ages be same. Let their ages be x and and age of Bharti be y, then,

x + x = y**...(i)**

x + x = y

and | (x – 3) | = | 5 |

(y – 3) | 11 |

⇒ 11x – 33 = 5y – 15

⇒ 11x – 5y = 18

Now, from equation (i) putting y in terms of x, we get

11x – 10x = 18

⇒ x = 18

So, the age of Bharti 7 years hence will be 18 + 18 + 7 = 43 years.

Hence, option E is correct.

3

D

Total age of 20 employees = 20 × 26 = 520

Let the average age of 5 new employees be x.

Therefore, the total age of the new employees = 5x

Hence, the total age of 20 employees = 360 + 5x

The average age of the new employees = 32

Hence, option D is correct.

Total increment in Group's age (15 + 5) × 2 = 40 years

Now, avg age of new employees = 24 + | 40 | = 32 years |

5 |

4

B

Let the present age of John be x and that of his son be yForming equations

x – 5 = 5(y – 5)

x + 5 = 3(y + 5)

After soving we get

x = 55 and y = 15

After how many years, he will be twice as old as son

55 + x = 2 (15 + x)

x = 25 years

The answer can be found by trying options

= | (55 + 25) | = 2 |

(15 + 25) |

Hence, option B is correct.

5

D

Let age of Rajan be x and that of his son be y

So as per the question:

(x – 2) : (y – 2) = 4 : 1 or 4 (y – 2)= x – 2 (this is the first equation)

(x + 5) : (y + 5) = 5/2 or 5(y + 5)= 2(x + 5) (this is the second equation)

Solving both of them we get x = 30 and y = 9

So present age of the son is 9 years

Hence, option D is correct.

Hence, option D is correct.

Problems on ages are based on finding out change in the age of a person or family after or before a period of time. One needs to understand the current age and seem the modification which is done, as the person passes through various life stages.

It can get a little confusing, however, knowing the time which is being talked about in a question can help you get through. To get better in these type of questions, we at Smartkeeda bring you an array of questions which are relevant to the examination.

Ensure you daily practice Problems on Ages at Smartkeeda as they come with detailed explanation. This will ensure you are able to solve questions in the required time.

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