Tech Mahindra
Company
Numerical Ability
Age Problem
5 years ago Ashu's mother was three times as old as Ashu. After 5 years, she will be twice as old as Ashu. How old is ashu today?
a) 35 years
b) 10 years
c) 20 years
d) 15 years
Read Solution (Total 7)
-
- 5 years ago::m- mother,a-ashu
m-5=3(a-5)......eq1
After 5 years
m+5=2(a+5)....eq2
By solving 1&2
a=15
So ashu age is 15 years
- 8 years agoHelpfull: Yes(7) No(2)
- let 5 years ago ashu's age=x
ashu' mother age=3x
after 5 years
2(x+10)=(3x+10)
x=10
present age of ashu=x+5=10+5=15
- 8 years agoHelpfull: Yes(5) No(0)
- ashu age is 10 yrs
- 8 years agoHelpfull: Yes(2) No(2)
- let ashu age =x and mother age=y
5 years ago ashu age=x-5 mother= y-5
according to statement y-5=3(x-5) -----------(1)
after 5 years ashu age=x+5 mother age=y+5
according to statement y+5=2(x=5) ---------(2)
soving beqn (1) and (2)
x=15 yrs
y=35 yrs - 8 years agoHelpfull: Yes(1) No(1)
- ==>x-5=3(y-5) {5 years ago .....three times old}
==>x-5=3y-15-->1
==>x+5=2(y+5) {after 5 years......twice old}
==>x+5=2y+10-->2
multiply eq--1 with 2 and eq --2 with 3
3x+15=6y+30
2x-10=6y-30
(-) (+) (-) (+)
--------------------
x+25=60
x=60-25
x=35
so answer is 35 - 8 years agoHelpfull: Yes(0) No(3)
- 5 years ago ashu age x
her mother age 3x
5 years after
2(x+5)=3x+5
x=5
today is x+5=10years - 8 years agoHelpfull: Yes(0) No(1)
- 5 yrs ago Ashu age= X
5yrs ago ashu's mother age=3x
And
After 5 yrs age of Ashu is 2(X+5) and ashu's mother age is 3x+5
2(X+5)=3x+5
2x+10=3x+5
10-5=3x-2x
X=5
And now age of Ashu now is 2(X+5)
2(5+5)
20
So now age of Ashu is 20 yrs - 5 years agoHelpfull: Yes(0) No(0)
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