Official Quant thread for CAT 2013

MBA CAT 2024
4761
@Shray14 said:
Each user on a computer system has a password with 6 to 8 character long having upper case letters and a digit. Each password must contain atleast one digit. How many possible passwords are there??
(36P6 - 26P6)+ (36P7 - 26P7) + (36P8 - 26P8)
4762

probability question


.0024/(.005+.0024+.0014)
24/88=3/11?
4763
@gnehagarg : please quote to the person your answering 😃
4764
@krum said:
spherical balls are put layer by layer in a conical flask inverted upside down such that each one touches the sides and the layer below it. If the diameter of bottom most ball is 8cm and that at the 5th level is 18cm. Find the diameter of the ball at the 3rd layer.1)12 cm2)13 cm3)8root3 cm4)none
rt(8*18)=12
4765
@gnehagarg said:
rt(8*18)=12
ur approach??
4766
Pick out the wrong number in the series: 210, 176, 145, 119, 92, 70
4767
@krum said:
spherical balls are put layer by layer in a conical flask inverted upside down such that each one touches the sides and the layer below it. If the diameter of bottom most ball is 8cm and that at the 5th level is 18cm. Find the diameter of the ball at the 3rd layer.1)12 cm2)13 cm3)8root3 cm4)none
3rd layer will be GM of 5th and 1st
root(18*8)=12
4768
@maddy2807 said:
Pick out the wrong number in the series: 210, 176, 145, 119, 92, 70
119
4769
@maddy2807 said:
Pick out the wrong number in the series: 210, 176, 145, 119, 92, 70
119??????
4770
@deedeedudu said:
119
logic??
4771
@Brooklyn said:
logic??
210-176=34
176-145=31
next 2 terms shud giv diff of 28....but in given series......145-119=26(wrong)
if diff is 28 den next term vill145-28=117
for next term 117-25=92
for next term 92-22=70
4772
@maddy2807 said:
Pick out the wrong number in the series: 210, 176, 145, 119, 92, 70
119
Starting with 70 the differences increase by +3
70+22 = 92
92+25 = 117
117+28 = 145
145 +31 = 176
176+34 = 210
4773
@maddy2807 said:
Pick out the wrong number in the series: 210, 176, 145, 119, 92, 70
119 ?

diff 3 se decrease hona chahiye..119 ki jagah 117 is gud to go..
4774
Find the wrong number in the series: 7, 14, 24, 87, 111, 328
4775
@maddy2807 said:
Find the wrong number in the series: 7, 14, 24, 87, 111, 328
111??
4776
@Brooklyn said:
111??
4777
@maddy2807 said:
Find the wrong number in the series: 7, 14, 24, 87, 111, 328
24 ? nt much sure!
4778
@maddy2807 said:
Find the wrong number in the series: 7, 14, 24, 87, 111, 328
111?

Diff between 7 and 14 = 7 = 2^3-1
Diff bet 14 and 24 = 10 = 3^2+1
Diff bet 24 and 87 = 63 = 4^3-1
hence, diff between 87 and next no should have been 87+5^2+1 = 112 and not 111
4779
@Brooklyn said:
111??
bhai can you please post similar 10 question if you have ?
4780
@rachit_28 said:
bhai can you please post similar 10 question if you have ?
ask maady yar !! i just posted ans !