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
2x = 38.
x = 19.
Son's age 5 years back (19 - 5) = 14 years.
Discussion:
99 comments Page 4 of 10.
Venkata ravi said:
10 years ago
Any another way to solve this problem?
Kavya said:
10 years ago
How can we use same variable for both son's present age and father's age at the time of birth?
Naseem Ahmad Saifi said:
10 years ago
"I was as old as you are at the present at the time of your birth" means that at the time of son birth father age was equal to present son age. So father age is now double of son age. Father's age now 38 year.
If son age is x then father's age = 2x.
Given that father's age = 38.
So, 2x = 38.
=> x = 19.
5 year back is x-5.
i.e 19-5 = 14.
If son age is x then father's age = 2x.
Given that father's age = 38.
So, 2x = 38.
=> x = 19.
5 year back is x-5.
i.e 19-5 = 14.
Krishna said:
10 years ago
Here is the clarity:
Let present age of son = x.
Given father present age = 38.
According to logic when son age is 0 (during birth), fathers age is x.
Then when son's age is x, then father's age is 38.
So x-0 = 38-x.
2x = 38.
x = 19.
Then 5 years back of son's age it will be 14 years.
Hope you understood.
Let present age of son = x.
Given father present age = 38.
According to logic when son age is 0 (during birth), fathers age is x.
Then when son's age is x, then father's age is 38.
So x-0 = 38-x.
2x = 38.
x = 19.
Then 5 years back of son's age it will be 14 years.
Hope you understood.
Thakurdas said:
7 years ago
38-x=x? Can anyone explain this?
Astik thombare said:
5 years ago
0-------------38
38-----------38+38 i.e.2*38.
From above we can conclude that son's age =father's age/2,
son's age =38/2=19,
hence,age of son before 5 years =19-5=14.
Son's age = 14 yrs.
38-----------38+38 i.e.2*38.
From above we can conclude that son's age =father's age/2,
son's age =38/2=19,
hence,age of son before 5 years =19-5=14.
Son's age = 14 yrs.
Narayan said:
5 years ago
@All.
Simply the calculation is; (father's present age - sons present age) = father's age at the time of birth.
But father's age at the time of the birth of his son = son's present age.
Simply the calculation is; (father's present age - sons present age) = father's age at the time of birth.
But father's age at the time of the birth of his son = son's present age.
Nikhil said:
6 years ago
Suppose father age is 37 years now, then what will be son's age?
Shree said:
6 years ago
@Vijay Anand.
It's a good explanation. Thanks.
It's a good explanation. Thanks.
Shekhawat said:
6 years ago
Father age is Always double of son's age so the answer is 38/2.
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