[hanishgarg]

HI guys
I couldn't understand the table given by Neha, please reply it in a proper format.
Guys the XAT Quant is getting on nerves , can we have pointers on how to prepare for XAT quant ,, does the section include the Dirty stuffy of class 12th as Matrices,determinants, defferntiation,integration.if yes how are the NON-engineerig guys gonna prepare.

Waiting for the reply
Hanish
Infosys Technologies Limited
Ph:- edited

Edited by PG: No tel numbers in the posts

[pankajprakash]

heyyy!? 'out this year questions..?have any special tricks?
pank

[sniper]

good job neha

[acd_indian]

people,

how to derive the percentage table for other values

[siddharth07]

Hey!!
that is pretty cool.. new to area and nice to see neha's concepts.. where have u got thru neha..? nice compilation of question.. gave me to work upon something.. i was getting bored in office..:-)

[varsha]

Hi junta
Hope somewhere here can help me out. I couldn't understand the percentage table. This is what I think it is. Pleeease correct me if wrong.

Is it like When a value decreases by 4%, we add 3.86
and when a value increaes by 4% we subtract 4.16.

What r the other uses of the table.

Could someone please help me out??

Thank u

[Done]

shouldn't the ratio be 240:210 instead of 240:90? 210 being 3.5 hours times 60 minutes.

[Done]

I meant this one in my previous post.

Originally Posted by Nawab @ Sun Jun 15, 2003 12:42 am

1. For Deccan Queen ans cannot be 7:16 the ans is correct 7:56
as if some train start at 5 and reaches 9 and other start at 7 and reaches 10:30 there is no question that it will ever cross the train which has moved 1/2 distance(2 hrs of its journey are over as it has to travel for 4 hrs)
now to ans as one train moves 4 hrs and other moves 1.5 hrs that is 240:90 min ratio or 8:3 ratio
therefore either it wud have crossed at 3/8 or 5/8 of 90 min as the prev has moved more than 1/2 dist it wud be 5/8 * 90 i.e 56 min
thus 7:56 is correct.
2. As in 8 month his total salary wud be 2/3 cycle and 2/3 * 300.
i.e 200 rs as he is given 50 rs which is 150 less than 200 thun this 150 is being compensated for the 1/3 of cycle which was given to him before full time
thus full cost of cycle is 450 Rs.

[MrAnderson]

hi,
posting this cos i see a couple of posts asking to xplain
neha's table of percentages.
first its uses: the info is xtremely important when dealing with problems of type..
say price increased by x% how much shud consumption decrease so that expenditure remains same.
also since most of the time speed dist..problems are in the end ratio proportion kind
this info will be xtremely useful..

so the info given is if increase is 25% decrease reqd to negate it is 20%.
In fact the table need not be memorized.the whole work can be done mentally without much problem..
the trick is to use 100 as a base and work on it..
for eg ..imagine price and consumption both as 100
now price increases by 25%..therefore ratio of new price/old price = 125/100
=> ratio of new consumption/old consumption = inverse of prev ratio = 100/125
=>change (decrease)= (125-100)/125 = 25/125= 20%
ive unnecessarily gone to such detail with the calc ..with xperience this is very simple..
for eg: 4% decrease
here's how one shud work it out.
4% decrease =>96/100 invert it=>100/96=>change 4/96 = > 1/24
this is as given in the table.
nother one 5% increase => 105/100=>100/105=>5/105=>1/21
..better to do it this way cos..
1)dont have to remember the table
2)no question of making a careless error while retreiving the memorized no:
3)takes very little time
4)improves ones understanding of ratios..while the other method is more or less learning by rote.
neway am not undermining the effort by neha .. if possible try memorizing but keep this info in mind just in case .

(if anything unclear/wrong plz lemme know)
andy.

[maverick_callsign]

hey can anybody suggest some good book for maths