My first attempt at a mob farm seems to have been too close to the ground. I wasn't getting very many mobs. When I killed mobs at ground level, more mobs would spawn in the mob farm. How tall should I build the next one so that it isn't affected by mobs on ground level?
Me and my friend want to build a basic 101 mob farm, but we can't decide where to put it. He says it has got to be over an ocean, I say it can just be 128 blocks above ground and it will be just fine.  So the question is:    What is the absolute ideal place for a mob spawner?  If we build it 128 blocks above ground do we still need to light up caves? If we dig a 128x128 square straight to bedrock will that make a perfect environment?   Please advise!
What is the time span of The Last Jedi? The number of 5-digit numbers such that their sum of digits is even is? I tried this problem by counting the number of 5-digit numbers and then dividing it by 2 just like we do for three digits. Please help. Thank you. How can I make all text the same font size (normal text, footnotes, acknowledgements etc.)? I have to submit a manuscript to a journal, and I just realized that they want every single part of the paper to be in 12 pt font. This includes tables text, footnotes, acknowledgements etc. Is there a way to force all text to be the same size? I read on the wiki that people will move in under the following conditions:   You do something to please them An empty house is available with a light source, table, and chair (also with walls).   I have a house which is about 7x8, then a roof space above that; about half the area. I could put furniture up there too, but will anyone move in? How to view all the Symbolic links,Junction points,Hard links in a Folder using dir? The command dir /a displays a list of all the files,folders in a given location. But it displays the type  for Junction Points as well as Symbolic Links to Folders. Is there any command which will differentiate and tell me which of these  are Junction Points and which are Symbolic links as well as which of the files are hard links ? Clipboard.GetText returns null (empty string) My clipboard is populated with text, but when I run  string clipboardData = Clipboard.GetText(System.Windows.Forms.TextDataFormat.Text);   I get back an empty string. I've toyed with various forms of the call including:  string clipboardData = Clipboard.GetText(); string clipboardData = Clipboard.GetText(System.Windows.Forms.TextDataFormat.UnicodeText);   But with the same result.  Am I missing something obvious? Can we get rid of the threshold of 15 chars for comments? I understand that there is an upper limit. But why do you have to type at least 15 characters to post a comment? It is easy to work around it anyway (like adding dots or other useless things). Are Ubuntu packages security audited? Canonical has recently announced , which is Ubuntu with a specific interface for mobile devices.  Where can I get phones with this version of Ubuntu pre-installed? If no devices are available yet, where can I pre-order one? Is there an easy way to change filetype association? After the upgrade to 11.10 I've had the problems that    all music-files would open with banshee, which then crashed all folders would open with konsole   The first problem I  after installation of "ubuntu tweak" "> admin > filetype Associations".. Changed back to totem.  The second was somehow not accessible this way (did not give any possibility to add commands).  I've changed the line "inode/directory=nautilus-folder-hanlder.desktop" to "inode/directory=nautilus.desktop" from "/usr/share/applications/defaults.list" and now everything works fine.  Question: More convenient ways to do that? Generate t distributed random variable in matlab How can we generate t distributed random variables with given mean and covariance in matlab. trnd is a function in matlab but we can get random variable with different degrees of freedom but how to get random variable with given mean and covariance? Rotate single PDF page when viewing I got a Latex document which renders fine, some content is rotated using the turn environment from the rotate package. Everything works like it should.  Except: It know that it is possible to display a single page in a pdf in another orientation. The document viewer then rotates this page when viewing. This would help the readers of my document to read the turned text.   How is this possible? Perhaps somehow using the pdfpageattr command?   Again: I do not to want to rotate the content, I just want to tell the PDF-Reader that it should rotate the page when displaying. Is Unicoins a April Fool’s Stunt? Is Unicoins a April Fool’s Stunt ? I had created the xml document with xml version="1.0".  In that document I need to use the greater than symbol &gt; and less than symbol &lt;.  How should I include those symbols? It's not working.  &amp;gt; and &amp;lt; are not working for me.  Is there any special encoder for this? error C2143: syntax error : missing ';' before 'type' How can I accept the Microsoft EULA agreement for ttf-mscorefonts-installer? After a recent update, ttf-mscorefonts-installer prompted me to accept its license agreement.     ┌─────────────────┤ Configuring ttf-mscorefonts-installer ├─────────────────┐  │                                                                           │   │ TrueType core fonts for the Web EULA                                          │                                                                               │ END-USER LICENSE AGREEMENT FOR MICROSOFT SOFTWARE                             │                                                                               │ IMPORTANT-READ CAREFULLY: This Microsoft End-User License Agreement           │ ("EULA") is a legal agreement between you (either an individual or a          │ single entity) and Microsoft Corporation for the Microsoft software           │ accompanying this EULA, which includes computer software and may include      │ associated media, printed materials, and "on-line" or electronic              │ documentation ("SOFTWARE PRODUCT" or "SOFTWARE"). By exercising your          │ rights to make and use copies of the SOFTWARE PRODUCT, you agree to be        │ bound by the terms of this EULA. If you do not agree to the terms of          │ this EULA, you may not use the SOFTWARE PRODUCT.                              │                                                                               │                                  &lt;Ok&gt;                                         │                                                                           │   └───────────────────────────────────────────────────────────────────────────┘    Screenshot:   For some reason my terminal will not allow me to accept, or for some reason I am pressing the wrong hotkey...  I've tried every letter on the keyboard and Enter among others...  I'm sure there is a very simple and obvious solution to this.  I've also just tried to remove the package completely however the terminal states that due to the package not being correctly installed, I should reinstall the package before removing it.  Very frustrating!  Essentially, because I cannot successfully install this package, I can't really ever upgrade my system because I always have to end up terminating the terminal with the license agreement (thus the upgrade fails). How to play blu ray .mkv files on ubuntu 20.04 LTS? How to play blu ray .mkv files on Linux? e.g:1080p.BluRay.DD5.1.x264-NTb.mkv Variation on Vandermonde's identity How can you show that $$ \binom{2n}{n}^2 = \sum_{m=0}^{n} \binom{2n}{2m} \binom{2m}m \binom{2n-2m}{n-m} $$?  I was fooling around with random walks, and apparently both expressions are supposed to be the number of unweighted random walks on a 2D square lattice of $2n$ steps that ends at the origin.  Whole thing reminds me of Vandermonde's identity but I can't it. Any hints? No custom off topic message when flagging on SO I have less than 3000 rep on StackOverflow. Now that the new closing changes are live, I cannot supply a custom off topic message:    I can enter a custom off topic flag message without issue here on meta, though it only has three canned off topic reasons, rather than five.  I'm not sure if this is the same for users with enough rep to vote to close directly, but the lack of a custom message eliminates the ability to use the correct flag reason in some cases.  For example, I wanted to flag , which is simply off topic on SO. However, I can't use a custom message, and none of the canned ones are appropriate.    appears to be the most up to date official information on custom reasons, and indicates that they are remaining in play for now.  supports that.  If this is by design, how should I flag such questions? This is not a case worth bothering the mods over, so I don't want to use a custom diamond attention flag. $AB-BA=I$ having no solutions