Official Quant thread for CAT 2013

@deedeedudu said:
Q 2. If the complex number z1 and z2 are such that |z1|=12 and |z2-3-4i|=5 then the minimum value of |z1-z2| is:A. 0B. 2C. 7D. None of these
Indeed OA is (B) 2
@Rage126 said:
@soham2208@catter2011 Bhai question is itself saying you 1+6=7 check unit digit 337-81=256=16*16.
Yah, but this is valid, when you consider positive values ONLY.. There could be negative values too naa
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?
A. 10:00 a.m.
B. 3:00 a.m.
C. 5:00 a.m.
D. both A. and B.
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
EDITED..read the option B as 3 pm initially
LCM of 10,12,20,25 = 300
So calls will be received simultaneously after every 5 hours..i.e at 10 am
So the answer should be (A)
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
is it A????/
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
10 am
@deedeedudu D. both A. and B.
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
option D.
at 3 and 10 am
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
A10 am
@soumitrabengeri said:
LCM of 10,12,20,25 = 300
So calls will be received simultaneously after every 5 hours..i.e at 10 am and then at 3 pm
So the answer should be (D)
option says 3 am
@techsurge said:
option says 3 am
Edited my post..please check again

@soham2208 Bhai Gussaa kun hote ho , then go other way 81*bahut badi value hogi aur 16*negative no choti value i.e. a*1-b*6=7(unit digit).
@soumitrabengeri said:
EDITED..read the option B as 3 pm initiallyLCM of 10,12,20,25 = 300So calls will be received simultaneously after every 5 hours..i.e at 10 am So the answer should be (A)
lol made the same mistake....
@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
OA given isssssssssssssssssssssss.................. A. 10:00 a.m.
Minimum value of root((x-4)^2 + (y-6)^2) if 8x+6y=28 ?
@soham2208 is the form right 2 ? (r1 - 2*r2)

@deedeedudu said:
Q 3. IBM-Daksh observes that it gets a call at an interval of every 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?A. 10:00 a.m.B. 3:00 a.m.C. 5:00 a.m.D. both A. and B.
learning from the a.m. typo...option A would be my final take. :P
@catter2011 is that 10/(sqt13)
@catter2011 said:
Minimum value of root((x-4)^2 + (y-6)^2) if 8x+6y=28 ?
is it 2rt5
@catter2011 sorrry 20/(sqrt13)