# Aptitude - Problems on Ages - Discussion

Discussion Forum : Problems on Ages - General Questions (Q.No. 3)

3.

A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 38 years now, the son's age five years back was:

Answer: Option

Explanation:

Let the son's present age be *x* years. Then, (38 - *x*) = *x*

2*x* = 38.

*x* = 19.

Son's age 5 years back (19 - 5) = 14 years.

Discussion:

98 comments Page 1 of 10.
Mr. Jigglynuts said:
7 months ago

@All.

Here is a simple way to understand this:

f = 38 (f for father's age),

x = son's age today.

x = number of years passed since the son was born until today (same thing in different words)

x = the age of the father when the son was born.

The age of the father when the son was born + the number of years passed since the son was born = the father's age.

x + x = 38.

2x = 38,

x = 19.

Here is a simple way to understand this:

f = 38 (f for father's age),

x = son's age today.

x = number of years passed since the son was born until today (same thing in different words)

x = the age of the father when the son was born.

The age of the father when the son was born + the number of years passed since the son was born = the father's age.

x + x = 38.

2x = 38,

x = 19.

(15)

Swapnil A. V. said:
7 months ago

The present age of the son = x.

They said the Present age of the son = the Father's age at the time of the son's birthday.

i.e. 38 - x = x.

we get x = 19

a/c to condition,

x- 5= 19-5 = 14 (Answer)

They said the Present age of the son = the Father's age at the time of the son's birthday.

i.e. 38 - x = x.

we get x = 19

a/c to condition,

x- 5= 19-5 = 14 (Answer)

(5)

Chandra hero said:
8 months ago

F --------- S

1p ---------0p

2p ---------1p

38 ---------19

19 - 5 = 14.

1p ---------0p

2p ---------1p

38 ---------19

19 - 5 = 14.

(1)

Ahanya said:
1 year ago

Present age of son is not mentioned, the difference between the father and son' age is also not mentioned then how can we take 2x.

2x means if sons age is 6 then fathers has double the age of son but in this, it is not mentioned all these things then how can we take like this? Anyone, please explain me.

2x means if sons age is 6 then fathers has double the age of son but in this, it is not mentioned all these things then how can we take like this? Anyone, please explain me.

(2)

Imon said:
2 years ago

As we know,

Let 'x' be the present age of the son,

Past:

Son's Age = 0 (just born)

Father's Age = x(present age of son)

Present:

So, after 'x' no. of years, we can say;

x+x = 2x = 38,

x=19.

Answer Required = Five years ago = 19-5=14 years.

Let 'x' be the present age of the son,

Past:

Son's Age = 0 (just born)

Father's Age = x(present age of son)

Present:

So, after 'x' no. of years, we can say;

x+x = 2x = 38,

x=19.

Answer Required = Five years ago = 19-5=14 years.

(3)

Subas said:
2 years ago

Since "I was as old as you are at the present at the time of your birth= father is twice the son's age". So Son's age is x fathers age is 2x.

2x = 38.

x = 19,

Five years ago = 19-5 = 14 Years.

2x = 38.

x = 19,

Five years ago = 19-5 = 14 Years.

(1)

Prashanth said:
2 years ago

Let present age of son = x.

The present age of the father = 38.

Age of father at the time of his son birth = 38-x.

Father age at the time of his son birth = present age of the son,

38 - x = x,

x = 19

19 - 5 = 14.

How can his son be born at the age of 14? Please anyone explain.

The present age of the father = 38.

Age of father at the time of his son birth = 38-x.

Father age at the time of his son birth = present age of the son,

38 - x = x,

x = 19

19 - 5 = 14.

How can his son be born at the age of 14? Please anyone explain.

(2)

Mahesh mote said:
2 years ago

Nice Thanks @Shriram.

Bhushan J said:
2 years ago

Let present age of son = x.

The present age of father = 38.

Age of father at time of his son birth = 38-x.

Father age at the time of his son birth = present age of the son,

38 - x = x,

,x = 19

19 - 5 = 14.

The present age of father = 38.

Age of father at time of his son birth = 38-x.

Father age at the time of his son birth = present age of the son,

38 - x = x,

,x = 19

19 - 5 = 14.

NIDHEESH said:
2 years ago

Father 38.

Half of the father age 38/2 = 19.

Hence 5 years back =19 - 5 = 14.

Half of the father age 38/2 = 19.

Hence 5 years back =19 - 5 = 14.

(1)

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