IndiaBIX.com
Arithmetic Aptitude Data Interpretation
Logical Reasoning Verbal Reasoning Non Verbal Reasoning
General Knowledge
Sudoku Number puzzles Missing letters puzzles Logical puzzles Playing cards puzzles Clock puzzles
C Programming C++ Programming C# Programming Java Programming
Microbiology Biochemistry Biotechnology Biochemical Engineering
Civil Engineering Mechanical Engineering Chemical Engineering Networking Database Questions Computer Science Basic Electronics Digital Electronics Electronic Devices Circuit Simulation Electrical Enigneering Engineering Mechanics Technical Drawing
Placement Papers Group Disucssion HR Interview Technical Interview Body Language
Aptitude Test Verbal Ability Test Verbal Reasoning Test Logical Reasoning Test C Programming Test Java Programming Test Data Interpretation Test General Knowledge Test
Data Structures Operating Systems Networking DATABASE Database Basics SQL Server Basics SQL Server Advanced SQL Server 2008 JAVA Core Java Java Basics Advanced Java UNIX Unix File Management Unix Memory Management Unix Process Managemnt C Interview Questions The C Language Basics .NET Interview Questions .NET Framework ADO.NET ASP.NET Software Testing

Aptitude - Problems on Ages - Discussion

@ : Home > Aptitude > Problems on Ages > General Questions - Discussion

Read more:

"I never see what has been done; I only see what remains to be done."
- Marie Curie
4. 

A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?

[A]. 7[B]. 8
[C]. 9[D]. 10
[E]. 11

Answer: Option B

Explanation:

Let C's age be x years. Then, B's age = 2x years. A's age = (2x + 2) years.

(2x + 2) + 2x + x = 27

5x = 25

x = 5.

Hence, B's age = 2x = 10 years.


Dharumaraj S said: (Mon, Jun 7, 2010 12:50:30 PM)    
 
(b-2)+ b + .5b =27

which is an alternate method to solve the same problem.....

Suresh said: (Wed, Jun 16, 2010 05:00:30 AM)    
 
Mr Dharumaraj shall you please explain ur answer?

Shan said: (Sat, Aug 21, 2010 01:37:45 AM)    
 
Hi,

let c year is x
then B is twice of C then, B=2x
Then A is 2 years older then B, therefore now B=2x,Then A=2+B, that is A=2+2x
Therefore sum up all the value:[(2+2x)for A,2x for B,x for C]
therefore 2+2x+2x+x=27
5x+2=27
5x=27-2
5x=25
x=25/5
x=5
now B is directly linked with C rather then A
Therefore B=2x
where x=5
2*5=10 that'z it my frnd

Sri said: (Sat, Oct 2, 2010 12:36:02 PM)    
 
B is twice as old as C means C=2B right?

Raheem said: (Tue, Nov 16, 2010 11:56:03 AM)    
 
Who is twice as old as c means?

Sweta said: (Wed, Dec 22, 2010 06:27:52 AM)    
 
We can also solve as
A's age be x yrs. then B's age is x-2 and C's age is(x-2)/2.

Prashanth said: (Wed, Jan 19, 2011 03:50:40 AM)    
 
Your thought is right but answer will be wrong..just watch
A+B+C=27
x+x-2+(x-2)/2 = 27
2x+2x-4+x-2 = 27*2= 54
5x-6 = 54
5x= 48
Finally x=48/5
which is a wrong ans
always we have to equal the x to the smallest number as per the problem....

Shalini said: (Tue, Feb 22, 2011 12:28:10 PM)    
 
I got ur explantion but in solving y cannt we take

2(2x)+2x+x=27 bcoz when i read this question i did in this way only but when after
I saw this answer it was different.

SO PLZ TELL ME SOME TIPS HOW 2 IDENTIFY THIS IS BELONGS 2 THIS METHODS

Ganesh said: (Fri, Mar 4, 2011 04:16:49 PM)    
 
A=2+B,
B=2C

A+B+C=27
so (2+B) + B + B/2 = 27
2B + B/2 = 25
5B/2 = 25
B=10

Ilaks said: (Tue, May 17, 2011 09:48:07 AM)    
 
@shalini

Read the ques properly.

Assume C=X. it is given that A IS 2 YEARS OLDER THAN B. It means that we should ADD the 2 years to B's age, so A=B+2.

Then for C it is given that it was TWICE AS OLD AS C. so it is understood tat it should be MULTIPLIED WITH THE C'S AGE. so B=2X.

Finally, sub B=2X in A's equation(A=B+2). therefore A=2X+2

Now A+B+C=27, therefore sub the values of A,B,C in the equation

2X+2+2X+X=27
5X+2=27
5X=27-2
5X=25
X=5.

Vignesh Venkatesan said: (Wed, May 18, 2011 07:36:11 AM)    
 
@Sri

b is twice old as c means.. c=b/2
b=2c

Wisdom said: (Mon, Jul 4, 2011 07:05:03 AM)    
 
a=x;
b=x-2;
c=(x-2)/2;

a+b+c=27
x+x-2+[(x-2)/2]=27
[2x+2x-4+x-2]/2=27
5x-6=54
5x=60
x=12
b=x-2;
b=10 we got answer

Sathya said: (Mon, Aug 8, 2011 12:09:29 PM)    
 
Why we take c=x. Why we not take that a=x;.

Please explain.

Swetha said: (Tue, Aug 9, 2011 05:38:21 PM)    
 
@Sathya

We can take a = x also.

Whatever we take, answer 'll be same.

Jatinder S said: (Sun, Sep 11, 2011 11:11:42 AM)    
 
A=B+2....1 given
B=2C .......2 given
from statement 2 : C=B/2
total is 27
therefor
A+B+C=27
B+2+B+B/2=27
4B=50
B=10.

Srini said: (Fri, Nov 4, 2011 11:36:31 AM)    
 
Can you give me short cut to solve this?

Arokiaraj said: (Sun, Dec 4, 2011 07:41:39 AM)    
 
c=x
b=2x
a=2x+2
(2x+2)+2x+x=27
5x=25
x=25/5
x=5
b=2x
b=2*5=10

Nagendra said: (Thu, Dec 22, 2011 10:01:46 AM)    
 
The population of town was 24000. If males increases by 6% and females by9%, it becomes 25620. Number of males and females are?- Please any one explain me...

Naresh said: (Mon, Mar 5, 2012 04:52:29 PM)    
 
Hi dude............
females(Y)=6000,males(X)=18000
x+y=24000........................(1)
(106/100)x+(109/100)y=25620.......(2)
by solving this 2 u get before increasing values..........
after increasing total number of females are (109/100)*6000=6540
after increasing total number of males are (106/100)*18000=19080
total is 25620

Hence proved(any doubts?)

Renu said: (Tue, Apr 10, 2012 12:32:53 AM)    
 
A+B+C=27
(B+2)+B+(B-2)=27
3B=27
B=9

Geetha said: (Mon, Apr 30, 2012 08:24:08 PM)    
 
How u get x=18000 and y=6000?
How it come?
106/100
109/100

Kalai said: (Mon, May 7, 2012 04:32:19 PM)    
 
A is 2 years old than B ===> A= B+2
B is Twice as old than c ===> B=2C ==> C=B/2
A+B+C = 27
So we can write as below
A+B+C = 27
B+2+B+B/2 = 27
B+B+B/2=27-2
2B+B/2=25
(4B+B)/2=25
5B=50
B=10

Rupinder said: (Mon, Jun 4, 2012 01:36:41 PM)    
 
A+B+C=27----------(1)
A=B+2-------------(2)
B=2C => C=B/2-----(3)

Put (3),(2) in (1)
=>(B+2)+B+(B/2)=27;
=> 2B+4+2B+B=54;
=> 5B=50-4;
=> B=10;

Hope it'll help you

Shajil George said: (Wed, Sep 12, 2012 11:34:36 AM)    
 
Let the age of c is x
Given that the age of b is twice of c age so,
b is age is 2x
Similarly
a is two years grater than b is age, so,
a is 2x+x
From the Question
The sum of a,b,c is 27
Then,
2x+2+2x+x=27
5x+2=27
5x=27-2
5x=25
x=25/5
=5
So,the age of b is 2x,
The value of x is 5
So the age of bis 10.

Neeta said: (Sun, Oct 14, 2012 09:41:11 PM)    
 
Why can't we take B=x? if answer is same when we assume any one out of A B C =x, answer will be wrong if we assume B=x

B=X
A=X+2
C=2X
Then A+B+C=27

X+2+X+2X=27
4X+2=27
4X=27-2
X=25/4
X=6.25

Write your comments here:
Name *:     Email:


© 2008-2013 by IndiaBIX™ Technologies. All Rights Reserved | Copyright | Terms of Use & Privacy Policy

Contact us: info@indiabix.com     Follow us on twitter!