Official Quant thread for CAT 2013

MBA CAT 2024
24188
@saurav205 said:
A warehouse contains 200 shoes of size 8, 200 shoes of size 9 and 200 shoes of size 10. Of these 600 shoes, there are 300 left shoes and 300 right shoes.. What is the minimum number of usable shoes?50100200none of these.P.S. : Everyone match dekhing kya?? No activity on the thread today...
_______________/\______________
200 ???

24189
@saurav205 said:
A warehouse contains 200 shoes of size 8, 200 shoes of size 9 and 200 shoes of size 10. Of these 600 shoes, there are 300 left shoes and 300 right shoes.. What is the minimum number of usable shoes?50100200none of these.P.S. : Everyone match dekhing kya?? No activity on the thread today...
100 kya?
24190
@DeAdLy said:
_______________/\______________200 ???
___/\___
Check again...
Approach ??
24191
@Narci said:
100 kya?
Approach ??
24192
@saurav205 said:
___/\___Check again...Approach ??
arey galat hai kya??
maine to sirf 3 types dekh ke 1/3 usable samjha to out of 600 = 200

matalb solve karvaoge!
24193
@saurav205 said:
A warehouse contains 200 shoes of size 8, 200 shoes of size 9 and 200 shoes of size 10. Of these 600 shoes, there are 300 left shoes and 300 right shoes.. What is the minimum number of usable shoes?50100200none of these.P.S. : Everyone match dekhing kya?? No activity on the thread today...
Dekho agar 300 left shoes hai toh maximum 200 shoes of size 8 will all be left shoes..
Similarly 300 right shoes bole toh anyother size 9 or size 10 can all be right shoes..
So the remaining 100 left shoes and 100 right shoes shoulld be from one particular pair.. hence 100..
24194
N = 3! + 4! ..... + 64!which of the following statements is true regarding N
a) N --perfect square
b)N --perfect cube
c) both A & B
D) neither A nor B
24195
@saurav205 said:
Approach ??
200 of 3 different sizes..

and 300 each of L and R both..

and since we need to find out least usable form, we need to find out maximum unusable ones..

so if we take 200 of size 8 all of L...

then we have 400 shoes remaining in which 100 are of L and 300 of R..

Also 200 of size 9 and 200 of size 10..

now if we take 200 of size 10 of R..

we have remaining 200 of size 9.. 100 L and 100 R..

so we have minimum 100 usables..


24196

100 O.o

24197
@saurav205 said:
A warehouse contains 200 shoes of size 8, 200 shoes of size 9 and 200 shoes of size 10. Of these 600 shoes, there are 300 left shoes and 300 right shoes.. What is the minimum number of usable shoes?50100200none of these.P.S. : Everyone match dekhing kya?? No activity on the thread today...
OA : 100
24198
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
D ?
24199
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
sorry i missed the +sign in between.. answer should be D
24200
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
D
24201
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
after 4! each term contains 0 at the last from 5! onwards
so utlimately last digit becomes 3! + 4! = 0(last digit)
square and cube of any number gives 0 at last digit only when number like 10,100 etc
which is not possible here so D
24202
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
Shud be D
24203
@Narci said:
100 kya?
Pujara ka? Haan. Also the answer to the question :)

regards
scrabbler
24204
@sachisurbhi said:
N = 3! + 4! ..... + 64!which of the following statements is true regarding Na) N --perfect squareb)N --perfect cubec) both A & BD) neither A nor B
All terms from 4! onwards are divisible by 8, but 3! is only divisible by 2
So, expression is of form 8n + 6 or 2(4n + 3)
Exponent of 2 in (3! + 4! + 5! + .... + 64!) is 1, so it can not be a perfect square or a perfect cube
24205
@scrabbler said:
Pujara ka? Haan. Also the answer to the question regardsscrabbler
thodi der baad vijay ka bhi..
24206

quant real headache to me plz tell how to approach for quant for cat .

24207
@saurav205 said:
Good Morning Guys,sab kahan gayab ho?When a two digit number is added to another two digit number having the same digits in reverse order, the sum is a perfect square.How many such 2 digit numbers are there?46810
8 numbers ?

10x + y + 10y + x = k^2
11(x + y) = k^2
x + y = 11
(2,9)(3,8)(4,7)(5,6)(6,5)(7,4)(8,3)(9,2)