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:
101 comments Page 5 of 11.
Vivek jain said:
2 decades ago
38-x=x means that
after substracting x(son's present age) from 38(father's current age),we will get the fathers age at the time of his son's birth and which was also x.
after substracting x(son's present age) from 38(father's current age),we will get the fathers age at the time of his son's birth and which was also x.
Ganesh dadi said:
8 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.
Geet said:
6 years ago
Let present age of son =x.
At the time birth son = 0 and father = x.
Now, son = x & father= 2x
So 2x= 38
=} x = 19.
5 years ago son was 19-5= 14 years.
At the time birth son = 0 and father = x.
Now, son = x & father= 2x
So 2x= 38
=} x = 19.
5 years ago son was 19-5= 14 years.
(2)
Harini Murugan said:
9 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.
Soni said:
3 years ago
Father's age = 38.
Now,
19+19=38.
Subtract 19 from 38,
38-19 = 19.
Than son age is 19.
and they ask about five years ago age so,
19 - 5 =14
Thankyou.
Now,
19+19=38.
Subtract 19 from 38,
38-19 = 19.
Than son age is 19.
and they ask about five years ago age so,
19 - 5 =14
Thankyou.
(72)
Saravanan said:
1 decade ago
Let the son's present age be x years.
Then, (38 - x) = x -> Why 'x' is subtracted from 38?
2x = 38 -> how 2x = 38 its not mentioned in the question?
Then, (38 - x) = x -> Why 'x' is subtracted from 38?
2x = 38 -> how 2x = 38 its not mentioned in the question?
Mercy said:
1 decade ago
Son's age is exactly to half to the fathers age, suppose if fathers age is 38 then sons age is 38/2 i.e, 19 and 5 years back his is 19-5 =14.
TITASH.810 said:
1 decade ago
How can we say that Both X is same variable?
I mean why 38-X = X,
Why not 38 - X = Y, where Y is Father's age.
At the time of Son's birth.
I mean why 38-X = X,
Why not 38 - X = Y, where Y is Father's age.
At the time of Son's birth.
Ramya said:
1 decade ago
How can you subtract the past age of father from his present age to get get the present age of son? I can't get you.
Preshkitha said:
1 decade ago
We can't take two variables because present son's age is equal to the age of father when the son was born. Okay. ?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers