Aptitude - My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

GeekInterview.com > Placement Papers > Infosys > Aptitude

Go To First | Previous Question | Next Question

Aptitude | Question 129 of 135

My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

Total Answers and Comments: 17

Last Update: August 28, 2009 Asked by: Kunal

Sponsored Links

Best Rated Answer

—

Submitted by: esha

let the fathers age be f and son's age be s
s=.5f => f=2s..................1
(f-10)/3=(s-10) => f-10=3s-30
3s-f=20.............................2
solving 1 and 2
we get son's age as 20 and fathers age as 40

Above answer was rated as good by the following members:
mandy5229, jayagopal, saiduth, amitdhuper, deepak643

Sorting Options

Page 1 of 2

« First

Last »

August 02, 2007 06:55:53

P.Senthilkumar

solution

Consider x is Son & y is Father.

ie x y/2 and x 1/3(y-10)

So Father's age is 20.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

August 24, 2007 07:51:04

esha

RE: My son is half of my age & was 1/3rd of my age 10 ...

let the fathers age be f and son's age be s
s .5f > f 2s..................1
(f-10)/3 (s-10) > f-10 3s-30
3s-f 20.............................2
solving 1 and 2
we get son's age as 20 and fathers age as 40

Is this answer useful? Yes | No

2 1

Overall Rating: +1

August 27, 2007 11:49:59

puspanjali

RE: My son is half of my age & was 1/3rd of my age 10 ...

let father's age is:- y
and son's age is :-x

present age son >x y/2
before 10 year the age of son is >x y/3

so now y/2 y/3+10

by solving this we get y 60

so presently the age of the father is 60 and age of the son is 30
where the age of the son was before 10 year is 1/3rd of the age of his father that is 20 year.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

September 25, 2007 04:59:06

jayakrishnan

RE: My son is half of my age & was 1/3rd of my age 10 ...

I accept the answer of Puspanjali

let father's age is:- F
and son's age is :- S

present age son >S F/2
before 10 year the age of son is >S-10 F/3

Substituing S F/2 in S-10 F/3

F/2-10 F/3
cross multiplying this we get
(F-20) 2F/3
3F-60 2F
Now
3F-2F 60
Therefore F 60

so presently the age of the father is 60 and age of the son is 30
where the age of the son was before 10 year is 1/3rd of the age of his father that is 20 year.

Is this answer useful? Yes | No

1 0

Overall Rating: +1

December 23, 2007 04:34:20

rahman_cam

Member Since: September 2007 Contribution: 1

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

let Fathers Present age is X;
Son's Present age is X/2;

10 years back......

Son's age (X/2)-10-----------1

According to Given Statement:

Son's age (1/3)(X-10)-------------2

on Equating 1 and 2 we get

(1/3)(X-10) (X/2)-10

which gives X 40..... (Which is Father's Present Age...)

Is this answer useful? Yes | No

2 0

Overall Rating: +2

February 14, 2008 11:46:57

steph47

Member Since: February 2008 Contribution: 15

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

lets sons age be S and fathers age be F

TODAY SONS AGE IS HALF OF FATHERS AGE

WE HAVE S 1/2 F

10 YEARS AGO IT WAS 1/3RD OF FATHERS AGE

S-10 1/3(F-10)

SUBSTITUTING F 2S IN THE ABOVE EQN WE GET

S AS 20

THATS IS THE SONS PRESENT AGE AND THEREFORE FATHERS PRESENT AGE WILL BE 2S I.E 2*20 40 YR

FATHERS PRESENT AGE IS 40

Is this answer useful? Yes | No

2 0

Overall Rating: +2

April 18, 2008 06:56:41

mayur_moradiya

Member Since: April 2008 Contribution: 1

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

suppose x is son so that father is 2x
10 years back son is x-10 and father is 2x-10

which is 1/3 of the father sons that's wy

x-10 (2x-10)*(1/3)
x 20 so father is 2x 40

Is this answer useful? Yes | No

3 0

Overall Rating: +3

May 25, 2008 01:17:54

sinju

Member Since: May 2008 Contribution: 3

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

let son's age b'x' n father's age b'y'.
given s "x y/2"

but 10 yrs back
(x-10) (1/3)*(y-10)
so y 40
now that s after 10 yrs father's age ll b "+10"
therefore y+10 50

Is this answer useful? Yes | No

June 19, 2008 02:33:19

praneet143

Member Since: June 2008 Contribution: 4

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?

Father

Is this answer useful? Yes | No

June 19, 2008 02:33:47

#10

praneet143

Member Since: June 2008 Contribution: 4

RE: My son is half of my age & was 1/3rd of my age 10 yrs back. What is my present age?