Official Quant thread for CAT 2013

MBA CAT 2024
7701
@bullseyes said:
the four eqns were a^2+c^2=58, a^2+b^2=169, b^2+d^2=400 , d^2+c^2=289here 'c' and 'd' are 'x' and 'y' acc to u..if c=15 or 8 then a gets negative value. refer to attachment in this reply to c how i get those eqns.pagalguy.com/forums/quantitati...
continuing my earlier work

by hit and trial

d^2=12, b^2=46, c^2=243, a^2=157

area ~ 369

:splat:



7702
@Faruq said:
Pawan and Qureshi working together can do a piece of work in 10 days whereas Qureshi and Rohit working together can do the same work in 12 days. All three work together to do a job for which they are paid Rs. 300. If Qureshi €™s share is Rs. 140, then what is Pawan €™s share?(a) Rs. 100 (b) Rs. 60 (c) Rs. 80 (d) Cannot be determined
i can see that it will be 100, still, can u post the explanation ??
7703
@krum said:
i can see that it will be 100, still, can u post the explanation ??
Work 60 units

P+Q = 6
Q+R = 5
Q/(P+Q+R)=140/300
3 eq and 3 unknowns...solve.
7704
@krum bhai dekh
140/300=7/15
then jo pawan bhai ka hissa hoga woh 5/15 aur dusre ka 3/15 hoga
toh 5*300/15=100
7705
@Torque024 said:
Work 60 unitsP+Q = 6 Q+R = 5Q/(P+Q+R)=140/3003 eq and 3 unknowns...solve.
@sauravd2001 said:
@krum bhai dekh 140/300=7/15then jo pawan bhai ka hissa hoga woh 5/15 aur dusre ka 3/15 hoga toh 5*300/15=100
aise pata hai, aur koi method dekhna tha mujhe, thanks
7706
@krum matlab jo sahi aa raha hai asani se woh thik ni hai kamaal ho bhai aap
7707
@krum said:
aise pata hai, aur koi method dekhna tha mujhe, thanks
do u have any other in ur head??
7708
In a three digit number ABC, if the number is reversed, it increases by 198. Also, if the tenth and
unit €™s place digits are reversed, the number increases by 9. If hundredth and tenth place digits are
reversed, the number increases by 90. What is the number?
a) 132 b) 321 c) 213 d) 312 e) 123
7709
@Cat.Aspirant123 said:
In a three digit number ABC, if the number is reversed, it increases by 198. Also, if the tenth andunit €™s place digits are reversed, the number increases by 9. If hundredth and tenth place digits arereversed, the number increases by 90. What is the number?a) 132 b) 321 c) 213 d) 312 e) 123
123?
7710
@19rsb said:
123?
pls..approach
7711
@Cat.Aspirant123 said:
In a three digit number ABC, if the number is reversed, it increases by 198. Also, if the tenth andunit €™s place digits are reversed, the number increases by 9. If hundredth and tenth place digits arereversed, the number increases by 90. What is the number?a) 132 b) 321 c) 213 d) 312 e) 123
123
7712
@Cat.Aspirant123 said:
In a three digit number ABC, if the number is reversed, it increases by 198. Also, if the tenth andunit €™s place digits are reversed, the number increases by 9. If hundredth and tenth place digits arereversed, the number increases by 90. What is the number?a) 132 b) 321 c) 213 d) 312 e) 123
option either posible b or e

now

only e statisfies condt of rest 😃
7713
C-A=2
C-B=1
B-A=1


Can we find the value of A,B & C
7714
@Torque024 said:
123
steps
7715
@Cat.Aspirant123 said:
steps
Go through options

otherwise make equations
100(c-a)+(a-c)=198;
10(c-b)+(b-c)=9;
100(b-a)+10(a-b)=90 and solve
7716
@Cat.Aspirant123 said:
pls..approach
take a no. abc=>100a +10b+c
reverse it =>100c+10b+a
diffn(given in ques)=99(c-a)=198=>c-a=2..........I
now reversing unit and tens digit=>100a+10c+b
taking diffn between this and original no.=9(c-b)=9=>c-b=1..........II
reversing 100th and 10th digit=>100b +10a+c
diffn with original no.=>90(b-a)=90=>b-a=1........III
with respect to I,II,III only 123 satisfies it...

7717
@Faruq said:
Pawan and Qureshi working together can do a piece of work in 10 days whereas Qureshi and Rohit working together can do the same work in 12 days. All three work together to do a job for which they are paid Rs. 300. If Qureshi €™s share is Rs. 140, then what is Pawan €™s share?(a) Rs. 100 (b) Rs. 60 (c) Rs. 80 (d) Cannot be determined
Q:P:R=7:x:8-x
effiiciency of P and Q:efficiency of Q and R=6:5
7+x/15-x=6:5
x=5
7:5:3
5:15*300
100
7718
@19rsb said:
take a no. abc=>100a +10b+creverse it =>100c+10b+adiffn(given in ques)=99(c-a)=198=>c-a=2..........Inow reversing unit and tens digit=>100a+10c+btaking diffn between this and original no.=9(c-b)=9=>c-b=1..........IIreversing 100th and 10th digit=>100b +10a+cdiffn with original no.=>90(b-a)=90=>b-a=1........IIIwith respect to I,II,III only 123 satisfies it...
C-A=2
C-B=1
B-A=1

so u had done dis trough trial n error
7719

guys pls help me with dis attached Q..I don't kno d answer..

7720
@quant89 said:
guys pls help me with dis attached Q..I don't kno d answer..
answer should be 15...