Two and half mean.. 2+1/2= 2/1+1/2=(2*2+1)/2=(4+1)/2=5/2
(Wed, Apr 27, 2011 11:00:04 AM)
See two and half means 2*1/2
So 2*2+1 = 5/2.
(Fri, Apr 29, 2011 12:44:43 AM)
Rohit age is x and his father age is 3x ofter 8 years rohit age is 5/2(x+8) and his father age is 3x+8 therefore
Rohit age is 24 then his father age is 72 year ofter 8 years
It becomes 32 and 80 it is exactly 2 1/2 times of rohit age so answer is 2 times.
Ezhil Arasan Scad Cet said:
(Tue, May 3, 2011 12:31:24 PM)
Guess whatz the wrong here:
1st father age is 24 and Rohit age is 8...
atter 8 years: father age is shd b 24+8=32 and Rohit age is 8+8=16...
But in sum itz given after 8 years his age is 2.5 times>then Rohit age... But here 32 nd 16 two times only greater... Why?
(Wed, May 4, 2011 01:36:56 AM)
Thank you vaisu & uttam for your explainations.
Gautam Negi said:
(Fri, May 6, 2011 02:59:04 AM)
Thanks a lot guys.
(Tue, May 17, 2011 08:18:51 AM)
We already add 8 years....to get the x value then Why we add 16 yrs in second step.
(Fri, May 20, 2011 07:41:55 AM)
Answer to 5/2(x+8) ...in example its is written that After 8 years, he would be two and a half times of Ronit's age
So two and a half is 2 1/2, now 2x2 is 4 and 4+1 is 5 so its 5/2..
(Thu, May 26, 2011 04:09:14 PM)
let the age of the son be "x"
father is aged 3 times more than his son so x+3x=4x
after 8 years,
age will be 2 and half years i.e 2 1/2 = 5/2,
after further 8 years;
==> ?=4x+16/x+16...equation (2)
==> substitute x=8 in eqution (2),
u will get ?=2
(Fri, Jun 3, 2011 03:15:01 AM)
Let the age of the son be "x"
father is aged 3 times more than his son so x+3x=4x }(i agree this part)
after 8 years,
4x+8=x+8....equation (1)( doubt here q1: how X=4X that is how father age is equal to son age )
(Wed, Jun 15, 2011 01:07:29 AM)
Thank you friends for your explanations.
(Tue, Jun 28, 2011 03:41:57 AM)
Can anyone say how the term 5/2(x=8)comes in the 2nd part please ?
(Wed, Jul 6, 2011 04:29:14 AM)
As the in statement state that fathers age would be 2 and 1/2 of the ronits ages.
Ronits age is x,
his fathers age is x+3x=4x,
after 8 yaers
As in question, fathers age is three times more than son's age. If we take sons age as x than father's age wll 3x how that 4x?
Subrata Hazra said:
(Mon, Aug 1, 2011 04:49:42 PM)
It is very much clear in the question first line that father is aged three times more than his son Ronit.
So simple is that if his sons age -x , then his age is x+3x = 4x
(Tue, Aug 9, 2011 12:21:41 AM)
Hi frndz my solution takes much lenghthy, but have tried to give a clear explanation
Let Father=F & Rohith=R
consider R's age as "X"
Now F's age will three times morethan R's age, so it'll be X+3X=4X
Now in 2011 F's age is 4X and R's age is X, but after 8 years say 2019 what is the F's age?
4X+8 and R's age X+8 (add 8 to F' and R)
As mentioned in the statement the age of F's is two and half(2+1/2) times ,so it will be 5/2.
Now on LHS side it is F's age
and RHs it is R's age X+8 multiple of 5/2 as
again after 8 years
we have X=8
the ans is "2"
Hope u got it..
(Tue, Aug 9, 2011 12:33:39 AM)
Hi Sharaddha here sum explansn to your doubt.
As you said Father's age is three times then son's age.
Here x or 1x both are same, I think you done this way.
"X", to this three times as 1x, 2x, 3x.
This way u'll get 3x, but we know X and 1X are same so.
To X (or 1X both are same) it is three times as 2x, 3x, 4x.
Now the F's age is X+3X=4X.
Shweta Chaubey said:
(Wed, Aug 10, 2011 07:58:11 PM)
Son present age is =x
than father's present age is=more than 3 times of son age
According to the question,
after 8 years..
and father will be 5/2 greater than son
ratio after 8 years
(Thu, Aug 11, 2011 07:35:51 PM)
Let son"s age is =1 then father age=4
which means ratio between father to son= 4 :1 (say f: s)........
after 8 years this ratio = 2.5 : 1 ( f :s)
but one thing is clear that difference betwwen father age and son age will always be same.
In eq.  difference is 3 and in  is 3 as it shuld be.
Now take a look at fther age .............it was 4 and after 8 years it is 5 ...it means in our values
n the ratio 1=8,
so ........................5=40(father age after 8 years)
and.......................2=16(son age after 8 years )
Hence after further 8 years later father age =40+8 =48 years and
................. son age = 16+8= 24
So ratio = 48:24
(Tue, Aug 23, 2011 03:04:41 PM)
(Wed, Aug 24, 2011 09:22:22 PM)
Ravee too good explanation.
(Thu, Aug 25, 2011 06:41:36 PM)
@durgesh. Your explanation is very good. Nice one.
(Fri, Aug 26, 2011 10:47:22 AM)
Thanks vaishu I understood your explanation clearly.
1)let ronit age be-> x,
2)father age be-> 3x+x,(as it is said 3 times more than ronit so 3x+x)
3)now it is said dat after 8 years,the father age will be two and half times ronit that is
4)again after 8 yrs,
now put x=8(from 1)
Hope you all understand...
(Wed, Sep 28, 2011 12:03:03 PM)
(4x+8)=5/2(x+8) please can u explain me how this step came...
father age was 4x sun age was x
next after 8 years,
father age was 4x+8 sun age was x+8
Now he would be 2 and half times more than his son right then,
Here i didn't get...
(Wed, Oct 19, 2011 12:36:38 PM)
The sum of ages of family members (both children and parents) is 360 years.The total ages of children and parents are in the ratio 2:1 and the ages of wife and husband are in the ratio 5:7.What will be the age of husband?
a)60 b)77 c)75 d)70
Answer : d) 70
Sum of ages is 360 years.The ratio of children and parents ages is 2:1.
Total age of parents = 360 x 1 / 3 = 120 years
Ratio of wife and husband age is 5:7. Therefore, the age of husband = 120 x 7 / 12 = 70
Hence the age of husband is 70 years.
any one explain me????? plz how it came.
(Wed, Nov 23, 2011 02:56:16 PM)
How 5/2(x+8) please explain?
(Wed, Nov 23, 2011 10:24:33 PM)
In question it is mentioned that After 8 years he(means father) would be two and a half times (5/2)of Ronit's age....
(Mon, Jan 23, 2012 06:15:46 PM)
I can't understand the last step can you please explain it.
(Mon, Feb 13, 2012 03:15:19 PM)
Hai Leenus, let us assume son's current age is x, fatther's age is 3 times more than that of son, so it will be x+3x=4x.
So present age of son is x and father is 4x. We want to find the ratio of ages after 16 years (8 and further 8, total 16).
So after 16 years fathers will be 4x+16 and son's will be x+16, hence that ratio came.
Now have alook at it, hope you will get that.
(Thu, Feb 16, 2012 05:24:35 PM)
I did not get how it became x+3x?
(Mon, Mar 5, 2012 04:13:55 PM)
Lovely please read question carefully..........
"At present age of father is (3)times more than his son"
"after 8 years age of father is (2 1/2)times more than his son"
(X= 2 1/2)
"AFTER 8 YEARS WHAT IS THE SONS AGE (i.e here, age of the son will be reducing half,gap of 8 years)"
(Mon, Apr 2, 2012 07:08:36 PM)
I want details answer for 4x+16/x+16 and how did we get answer 48/24 please. Reply me.
(Sun, Apr 15, 2012 10:24:18 AM)
Hey we got the x value is 8. So just put the value of 8 in place of x and find out the ratio, you definitely get the answer.
(Tue, Jun 5, 2012 08:48:10 PM)
Thing logically friends first 8 years it decreases to off of next 8 years so. The answer is 2.
(Mon, Jul 9, 2012 06:29:30 PM)
If father's present age 37 year then what's the age of son ? please help me.
Sara Shree said:
(Sat, Aug 25, 2012 04:20:29 PM)
I think we should take father's age be y.
So x+8 is equal to (3y+8)5/2
(Thu, Aug 30, 2012 10:46:17 PM)
(Mon, Sep 10, 2012 12:17:01 PM)
Is there any formula this problem.
(Sun, Nov 18, 2012 05:26:35 PM)
Father age is 3 times in starting.
After 8 year father age will be 2 and half times of son.
Means after 8 year father age decrease 1/2 times.
So, after 16 year father age will be= 2(1/2)-(1/2) = 2 times of son.
(Sat, Jan 5, 2013 06:56:20 PM)
When it is "three times more" why should we take (3x+x)? It can also be (3x+2x) or (3x+.5x)?
(Wed, Mar 20, 2013 05:01:54 PM)
It is supposed of x years for son and in question father is more than 3 years of son so that it is of (3x+x). Thanks.
(Sat, Mar 23, 2013 11:12:06 PM)
What is the meaning of last line of Question?
And how it is resolved?
(Fri, Apr 19, 2013 12:43:01 PM)
How do we get (4x + 16) divide by (x + 16) instead of (4x+16)=(x+16)?
(Sun, May 5, 2013 04:15:28 AM)
There are times when we take x & y both variable. So how to identify whether we have to use 1 variable or both?
Vinay Kumar Jadhav said:
(Fri, May 17, 2013 09:59:08 AM)
For this sum answer should be option(B) which is 5/2 in fraction and in mixed fraction which is 2 1/2.
(Fri, May 17, 2013 03:28:19 PM)
Two and half times means : 2.5.
Multiply both numerator and denominator by 2.
2.5 x 2 / 1 x 2.
5/2 or 2.5.
(Thu, May 30, 2013 06:19:21 PM)
It doesn't make sense why ppl take the fathers age as 4X just becos its says 'times more' . what if the son's age is 'times less' of the father? :D
So I made a calculation based on logic and it comes to this
son's age = x.
Father's age = X x 3 = 3X.
After 8 years father is 2 and half years older than his son, so if we add 8 years to the fathers age it will be equal to 2 and a half times of the son's age.
i.e 3X + 8 = 2 and a half times of X.
3X + 8 = 2 1/2 x X.
From the equation X = 16.
Now the fathers initial age = 3X.
= 3 x 16 (X=16).
After 16 years (8+8 years) father will be,
= 52 + 16.
In the same way the son after 16 years will be,
= X + 16.
= 16 + 16 = 32.
Hence the difference of their age will be, 64 divided by 32
= 64 / 32.
So the Father will be 2 times older than the son in 16 years :D.
(Mon, Jun 3, 2013 05:00:13 PM)
And as @newbie said, if its correct then I am failing to understand that why is 3x + 8 = 2.5 x ? Shouldn't it be 3x + 8 = 2.5 (x + 8), because even the son's age should have been added to 8 right ?
(Tue, Jun 11, 2013 05:49:35 AM)
Fathers age is 3 times more than his son 4x.
But after getting full stop considering and comparing other sums I can understand like this (x+8). How we put (4x+8) in fathers age?