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 5 of 10.
Ganesh dadi said:
7 years ago
Let son age X and father age 38.
38(father age)-X (son age ) =X because father's age at the time of sons born (as per question ) =sons age i.e X.
Then 38-X = X.
38(father age)-X (son age ) =X because father's age at the time of sons born (as per question ) =sons age i.e X.
Then 38-X = X.
Adhil said:
7 years ago
38-x=x how can it possible there for 38-15=15 40-2=2 could anyone can explain? please.
Kira said:
7 years ago
@Vijay Ananad.
Nicely explain thanks.
Nicely explain thanks.
Dhanush said:
8 years ago
Son's age would always be half of father's age no matter what the father age is !
Because let say son age is 'x' now. When son born father age is also 'x'. So when son grew up and reach 'x', now father would be 2x.
So to find son age just divide fathers age by 2 (2x / 2 = x (son age) ).
Simple example: let say father age is 40.
0 x 20.
Son = <---------------->.
0 x 20 x 40.
Father= <-----------------><--------------->.
Then son ages - 5 = answer.
Because let say son age is 'x' now. When son born father age is also 'x'. So when son grew up and reach 'x', now father would be 2x.
So to find son age just divide fathers age by 2 (2x / 2 = x (son age) ).
Simple example: let say father age is 40.
0 x 20.
Son = <---------------->.
0 x 20 x 40.
Father= <-----------------><--------------->.
Then son ages - 5 = answer.
Tanushree said:
7 years ago
Thanks for the answer.
Tej said:
7 years ago
Thanks to all for giving clear explanations.
Maha said:
8 years ago
How did you formed (38-x) =x?
Harini Murugan said:
8 years ago
let's use ratio method.
Father : Son
38 : X
X : 0
Now do cross multiplication.
i.e. 2X=38 => X=19.
Five years back, the son's age is 19-5=14.
Father : Son
38 : X
X : 0
Now do cross multiplication.
i.e. 2X=38 => X=19.
Five years back, the son's age is 19-5=14.
Shano said:
8 years ago
How? Explain the solution.
Priya said:
8 years ago
@ALL.
X going to other side gives x and x give 2x here.
X going to other side gives x and x give 2x here.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers