Official Quant thread for CAT 2013

@rkshtsurana said:
iske kehna ka matlab yeh he...har doosri choclate uthayi usne..jese 1 then 3 thn 5 thn 7...79 , 2 and so on
Yesss!! you are right!
@ScareCrow28 said:
kaise kia??
standard method
binary repsentation of 80 = 101000
shift one digit left = 010001 = 33
@mailtoankit yr i had the same confusion,lekin ans 33 hai
@rkshtsurana said:
iske kehna ka matlab yeh he...har doosri choclate uthayi usne..jese 1 then 3 thn 5 thn 7...79 , 2 and so on
I had 2 questions for the same
1) what if question had said , he started with second chooclate , then how to approach?
2) if it total was a power of 2(128,1024), then would the answer be 1 ??
@techsurge said:
I had 2 questions for the same1) what if question had said , he started with second chooclate , then how to approach?2) if it total was a power of 2(128,1024), then would the answer be 1 ??
2) no it would be last one..if u ll search for its detailed derivation, this was the technique derived for circular arangement..so here the last one will be represnting the first one....simple 2^2 = 4
1 , 3 ,2 will be strike off ..left wid 4..

1)even if one starts wid 2..same techniques i used..represent the no as power of 2 and let x is the remainder..2(x) +1.....here remainder is16 eg :- 80 = 2^6 + 16...
@rkshtsurana said:
2) no it would be last one..if u ll search for its detailed derivation, this was the technique derived for circular arangement..so here the last one will be represnting the first one....simple 2^2 = 4
1 , 3 ,2 will be strike off ..left wid 4..

3)even if it start wid 2..same techniques i used..represent the no as power of 2 and let x is the remainder..2(r) +1.....here remainder is16 eg :- 80 = 2^6 + 16...
bhai ye nahi samajh aaya if it is 2^n
for eg. what will be the answer for 128
1 or 128 ???
@rkshtsurana said:
find the value of (32.1)^1/5 - ( 1.022)^-1/4
options
0.985
1.325
1.455
1.005
p.s - Time iift mocks
@gs4890
1.005 by approximation, dont know if its correct , do share correct and fastest approach
@sonamaries7 said:
A no N expressed to the base 5 is 232323...a total of 100 digits. What is the rem when N^4231 is divided by 4?0124
convert the no. to base 10
(232323.............23) in base 5
3(5^0+5^1+......5^50)+2(5+^2+5^3+.........5^49)
3(5^26-1)/4 + 2(5(5^25-1))/4
(3*5^26-3+10.5^26-10)
(5^27-13)/4

Rem((5^27-13)/4)^4231/4
Rem((4+1)^27-13)/4)^4231/4 ..............................since 13%4=1 and (4+1)27%4=1
Rem(1-1)^4231/4
0
@techsurge said:
bhai ye nahi samajh aaya if it is 2^nfor eg. what will be the answer for 1281 or 128 ???
it would be 128...for power of 2s this technique ll nt go, as i said it was derived for circular arrangemnt ..

check na wid 4 = 2^2 = 1 gaya , 3 gaya , 2 gaya....4 is the ans
8 = 2^3 = 1, 3, 5 ,7 , 2,6, 4......left 8...
so 128 will be left
in x-y plane 16x^2 + 9y^2 - 64x + 54y
1) hyperbola
2) exterior of circle
3) interior of circle
4) exterior of ellipse
5) interior of ellipse

p.s - TIME IIFT mocks ques @gs4890
p.p.s - do we need to study conic sections and detailed coordinate geo ?

@rkshtsurana said:
in x-y plane 16x^2 + 9y^2 - 64x + 54y2) exterior of circle3) interior of circle4) exterior of ellipse5) interior of ellipsep.s - TIME IIFT mocks ques @gs4890p.p.s - do we need to study conic sections and detailed coordinate geo ?
exterior of ellipse??
@ScareCrow28 said:
exterior of ellipse??
@rkshtsurana said:
x^2/3^2 + y^2/4^2
x^2/a^2 + y^2/b^2 = 1 is ellipse
where am i wrong?
@rkshtsurana said:
in x-y plane 16x^2 + 9y^2 - 64x + 54y2) exterior of circle3) interior of circle4) exterior of ellipse5) interior of ellipsep.s - TIME IIFT mocks ques @gs4890p.p.s - do we need to study conic sections and detailed coordinate geo ?
option 5??
@bullseyes
@ScareCrow28 eelipse toh he but
@ScareCrow28 said:
exterior of ellipse??
How
@rkshtsurana said:
@bullseyes@ScareCrow28 eelipse toh he but
but it's and not 1 which is exterior??
@rkshtsurana said:
in x-y plane 16x^2 + 9y^2 - 64x + 54y2) exterior of circle3) interior of circle4) exterior of ellipse5) interior of ellipsep.s - TIME IIFT mocks ques @gs4890p.p.s - do we need to study conic sections and detailed coordinate geo ?
not sure u need to learn for conics for IIFT.. TIME qs are majorly exaggerated.. but on a safe side just go thru once.. will hardly take an 30 mins or so
@rkshtsurana said:
in x-y plane 16x^2 + 9y^2 - 64x + 54y2) exterior of circle3) interior of circle4) exterior of ellipse5) interior of ellipsep.s - TIME IIFT mocks ques @gs4890p.p.s - do we need to study conic sections and detailed coordinate geo ?
is it interior of ellipse?
@ScareCrow28 said:
but it's 1 which is exterior??
eqn of ellipse has RHS to be 1