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:
100 comments Page 8 of 10.
Prachi said:
2 decades ago
Thanks dear.........
SriRam said:
2 decades ago
@ Karthik
Father's present age - Son's age = Father's age at the time of Son's birth.
Father's present age - Son's age = Father's age at the time of Son's birth.
Karthick said:
2 decades ago
Meaning of 38 - x = x ?
Goud said:
2 decades ago
The meaning is ' the sons presant age= father's age at the time son's birth
Shan said:
2 decades ago
The meaning is [if father age is 30 @ past then son age is 0]
-----
Then [if son age is 30 @ present then father age is 60] that is
--------
The explanation... See that (the past age of father= the present age of son)
-----
Then [if son age is 30 @ present then father age is 60] that is
--------
The explanation... See that (the past age of father= the present age of son)
Shruthi said:
2 decades ago
The meaning was "at the time of son's birth, father age was son's present age".
Pradeep Kumar Maurya said:
1 decade ago
38-x = x.
LHS RHS.
Keep the variable one side and numbers also a side,
We get,
38 = x+x (Because LHS-x when it will put on RHS then sign will be change as per rule).
Now, 38 = 2x.
38/2 = x (Here coefficient of x i.e. 2 will be denominator of 38).
19 = x.
You can say x = 19.
LHS RHS.
Keep the variable one side and numbers also a side,
We get,
38 = x+x (Because LHS-x when it will put on RHS then sign will be change as per rule).
Now, 38 = 2x.
38/2 = x (Here coefficient of x i.e. 2 will be denominator of 38).
19 = x.
You can say x = 19.
88gguyu said:
2 decades ago
What is meaning of "I was as old as you are at the present at the time of your birth".
Venkata ravi said:
1 decade ago
Any another way to solve this problem?
Ranjiraj Nair said:
1 decade ago
Father Son.
Present age -> 38 let be 'x'.
At Birth -> 38-x (x-x) = 0.
By statement: I was means father was was as old as you as you are at the present i.e. son at the time of son's birth so,
Present age of son = x years.
Fathers age at son's birth = (38-x).
Just equate it: x = 38-x.
x = 19.
They want 5 years ago so 19-5 = 14.
Present age -> 38 let be 'x'.
At Birth -> 38-x (x-x) = 0.
By statement: I was means father was was as old as you as you are at the present i.e. son at the time of son's birth so,
Present age of son = x years.
Fathers age at son's birth = (38-x).
Just equate it: x = 38-x.
x = 19.
They want 5 years ago so 19-5 = 14.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers