Latest Infosys Aptitude Question SOLUTION: Q. Father says my son is five times older than my daughter. my wife is 5 times older that my son. I am twice old from my wife and altogether (sum of our ages) is equal to my mother

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Q. Father says my son is five times older than my daughter. my wife is 5 times older that my son. I am twice old from my wife and altogether (sum of our ages) is equal to my mother's age and she is celebrating her 81 birthday. so what is my son's age?

Asked In Infosys RagunathKC (10 years ago)

Unsolved Read Solution (16)

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Read Solution (16) :

mahima srivastava  (10 years ago)

let daughter's age be x
son's age= 5x
wife's age=25x
his age= 50 x
sum= 81= x+5x+25x+50x
hence, x=1
now daughter's age is x=1
sons' age is 5x=5
son is 5 years old

Is this solution Helpfull? Yes (56) | No (2)  

thangamani  (10 years ago)

son's age is 5 years

Is this solution Helpfull? Yes (5) | No   

Mani  (10 years ago)

given that all ages together is mothers age so
father+wife+daughter+son=81
i.e..,f+w+d+s=81
we know that sons age is 5 times the daughters age so s=5d then d=s/5
now
f+w+(s/5)+s=81
wifes age is 5 times sons age so w=5s
now
f+(5s)+(s/5)+s=81
we also know that fathers age is twice of wifes age so f=2w =>f=2(5s)=>10s
now
10s+5s+(s/5)+s=81
16s+s/5=81
81*s=81*5
finally ans is s=5...

Is this solution Helpfull? Yes (4) | No   

ritwik verma  (10 years ago)

s=5d, w=5s=25d, f=2w=10s=50d
50d+25d+5d+d=81
thus, d=1
hence, son's age= 5d=5

Is this solution Helpfull? Yes (4) | No   

varshika  (10 years ago)

lets son age is x
daughter age is y
wife age is z
father age is a
then
x=5y
z=5x
a=2z
altogether is
x+y+z+a=81
by substituting all
we get 81y=81
hence y=1
so x=5(1)
son's age is 5years

Is this solution Helpfull? Yes (2) | No   

Dhanashri  (10 years ago)

Daughter's age=D
son's age =5D
mother's age=5*son's age=25D
father's age=2*mother's age=50D
But,total sum of the four person is 81;
hence 50D+25D+5D+D=81
hence son's age is 5

Is this solution Helpfull? Yes (1) | No   

prabha  (10 years ago)

daughter age=x
son age =5x
wife's age=5(5x)=25x
father's age=5(25x)=50x
x+5x+25x+50x=81
x=1
so,ans=5

Is this solution Helpfull? Yes (1) | No   

babu shaik  (9 years ago)

5 YEARS
S=SON,D=DAUGHTER,W=WIFE,I=HUSBAND
S=5D
W=25D
I=50D
D+5D+25D+50D=81
D=1 THEN
S=5 YEARS

Is this solution Helpfull? Yes (1) | No   

surendra kumar  (9 years ago)

let daughter age =x .........5x+x+25x+50x=81,then x=1 so age of son is 5x=5*1=5

Is this solution Helpfull? Yes (1) | No   

sanjeev kumar  (10 years ago)

age of son=5 years

Is this solution Helpfull? Yes | No   

Firdous Imam  (10 years ago)

suppose daughters age=D
THEN sons age S=5D
wife age W=5s=5*5D=25D
my AGE H =2*W= 50D
NOW alltogether equals mothers age=81
D+5D+25D+50D=81
D=1,S=5D=5

SONS AGE =5

Is this solution Helpfull? Yes | No   

Ashish Gupta  (10 years ago)

25 will be answer...

Is this solution Helpfull? Yes | No (4)  

Prakash NV  (10 years ago)

S=5D
W=5S
M=2W
S+W+M=81
RIGHT ALL AGES IN TERMS OF SON
M=2W=2*5S=10S
s+5S+10S=81
16S=81
S=5

Is this solution Helpfull? Yes | No (1)  

arvind khatri  (9 years ago)

daughter=1 year
son=1*5=5 years
wife=5*5=25 years
father=25*2=50 years
sum=1+5+25+50=81 years

Is this solution Helpfull? Yes | No   

Abhishek Kumar  (9 years ago)

Let the age of daughter be x
Age of the son=5x,Wife's age=25x
Father's age=50x
According to question,
50x+25x+5x+x=81
Hence ,x=1
Therefore, Son's age is 5 yrs.

Is this solution Helpfull? Yes | No   

Diwakar  (3 years ago)

Son's age is 5.

Let us assume
daughter's age is x
Son's age will be 5x
Wife's age will be 5*5x = 25x
Father's age will be 2*25x = 50x

Sum(f,w,s,d) = age of mother (i.e.. 81)
x+5x+25x+50x = 81
81x = 81
X = 1(daughter's age)
Then sons will be 5*1=5

Is this solution Helpfull? Yes | No   

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