anakin

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$Mathematics$ Mathematics

Associated with Math.SE; for both general discussion & math qu...

anakin

Nov 24, 2013 06:31

@J.W.Perry I guess it is so since it is divisible by each of the terms

anakin

Nov 24, 2013 06:31

@J.W.Perry I also calculated as $6x$ but i'm not sure

anakin

Nov 24, 2013 06:25

What is the LCM of x, 2x and 3x?

anakin

Nov 15, 2013 15:47

So the multiplicative rule applies only to combinatorics? @Nick

anakin

Nov 15, 2013 15:44

@Nick How?

anakin

Nov 15, 2013 15:43

Should it be 3/8 * 4/10 ?

anakin

Nov 15, 2013 15:43

A bag contains 3 white and 5 red balls. Another bag contains 4 white and 6 red balls. A ball is drawn from the first bag and then from the second bag. What is the probability of the ball being white?

anakin

Nov 14, 2013 15:16

Got it @DanielFischer

anakin

Nov 14, 2013 15:11

@DanielFischer

anakin

Nov 14, 2013 15:11

That should give us 2k−1 in the RHS of 2k−1<2k also right? Then how 2k only?

anakin

Nov 14, 2013 15:07

@DanielFischer $x_i$ can only take values of 0 and 1

anakin

Nov 14, 2013 15:06

How do I get the RHS from the LHS of this ? $ \sum_{i=0}^{k-1}x_{i}2^{i}\leq\sum_{i=0}^{k-1}2^{i}=2^{k}-1<2^{k} $

anakin

Nov 14, 2013 14:23

@Charlie What if I'm on the dark side of the force? :P

anakin

Nov 14, 2013 14:21

What's the best book for brushing up on aptitude questions?

user2493976

Nov 10, 2013 06:33

How to evaluate the integral $\int_{0}^{100}e^{x-[x]}$

user2493976

Nov 9, 2013 14:23

The 300 digit number with all digits equal to 1 is :

A) Divisible by neither 37 nor 101 B) divisible by 37 but not by 101 C) divisible by 101 but not by 37 D) Divisible by both 37 and 101

Root Access

For all you Super Users out there. You have backups, right?

user2493976

Oct 21, 2013 13:15

is Windows 8 backward compatible with Office 2003 and Office XP?

user2493976

Oct 21, 2013 13:13

is Windows 8 backward compatible with Office 2003 and Office XP?

user2493976

Oct 19, 2013 13:40

@Braiam oh

user2493976

Oct 19, 2013 13:38

@Braiam I did, but its allowing write access on a UNIX emulator on Windows, but haven't got the chance to test on a full fledged linux

user2493976

Oct 19, 2013 13:35

And if the owner of a file doesn't have write permissions but the group to which he/she belongs has, can the owner write to it?

user2493976

Oct 19, 2013 13:34

user2493976

Oct 19, 2013 13:32

not even the owner?

user2493976

Oct 19, 2013 13:32

@Braiam and who can delete the file then?

user2493976

Oct 19, 2013 13:29

If a directory has the permission 777 and a file in it has the permission 000 what are the implications?

user2493976

Oct 17, 2013 15:00

@Bob thanks

user2493976

Oct 17, 2013 14:56

@Bob Uh the link you shared says "Strings containing * will not match filenames that start with a dot, as, for example, .bashrc. " so why does ls .* match them?

user2493976

Oct 17, 2013 14:51

@Bob yes its working now

user2493976

Oct 17, 2013 14:49

@allquixotic what are you getting?

user2493976

Oct 17, 2013 14:49

@allquixotic I agree

user2493976

Oct 17, 2013 14:49

I tried it out just now, its not matching directories

user2493976

Oct 17, 2013 14:47

excepting files beginning with a . as per the link you shared

user2493976

Oct 17, 2013 14:45

@Bob including the "." just ?

user2493976

Oct 17, 2013 14:43

so what does star dot star mean @Bob?

user2493976

Oct 17, 2013 14:42

@Bob yes that part I had read

user2493976

Oct 17, 2013 14:41

@Bob oh sorry, the question should have read ls "star dot star"

user2493976

Oct 17, 2013 14:40

@Bob the original question reads ls .

user2493976

Oct 17, 2013 14:39

@Bob thanks, I got the answer there, its mentioned Strings containing * will not match filenames that start with a dot, as, for example, .bashrc. ... I was asking why wasn't that expression ls . not matching the . file

user2493976

Oct 17, 2013 14:35

@Bob What does the * mean then in a shell?

user2493976

Oct 17, 2013 14:35

@Bob Yes I meant a shell

user2493976

Oct 17, 2013 14:34

@Bob not reg ex, i am talking about unix/linux shell

user2493976

Oct 17, 2013 14:32

I read that the * metacharacter in UNIX means 0 or more, so if I use ls . shouldn't it match just the "." as well?

user2493976

Oct 17, 2013 14:20

@DarthAndroid From this information how is it possible to find out the size of one page of memory?

user2493976

Oct 17, 2013 14:13

@Bob ok, thanks

user2493976

Oct 17, 2013 14:11

@Bob any resources for solving this would do, I'm not looking for a worked out answrer

user2493976

Oct 17, 2013 14:09

@Bob Yes, but i just can't seem to figure out this one

user2493976

Oct 17, 2013 14:07

How to calculate the size of the page table from this data?

A computer uses 46–bit virtual address, 32–bit physical address, and a three–level page table organization. The page table base register stores the base address of the first–level table, which occupies exactly one page. Each entry of the first level page table stores the base address of a page of the second–level table. Each entry of the second level page table stores the base address of a page of the third–level table. Each entry of the third level page table stores a page table entry (PTE). The PTE is 32 bits in size. The proces…