As President of the OGC, I would like to add an additional point. Your exam time limit doesn't start until you click on the button. That means you can take all the time you want to write out all the conversions on the scratch paper they give before you start the test! I find trying to do these conversions extra difficult when I'm worrying if I'll have enough time to finish the exam. Tom Lisa President, Groupstudy OGC (Self-Appointed) "Hartnell, George" wrote: > That Priscilla is a real jewel, eh? I think I'll add this formula to my > *must know* list. > > The one tid-bit I might include, though not reputed to be 'test centric', is > to *memorize* (I say this as a member in good standing of the O)ld G)eezer's > C)lub) the binary numeric for HEX digits. The 'weight' of the bits logic > has helped me out a few times.... An interesting math trick, 16^4 is > (ffff)+1 or (1111 1111 1111 1111)+1. Note that 2^16=16^4=1 0000 0000 0000 > 0000 binary=0x10000 hex. They all reach the same number. It took this 52 > year-old maybe a week of practice to 'grok this in it's fullness'. Just my > way of figgerin' it out. There are others. > > It is delightful to hear of someone who hasn't fired up the scientific side > of that Windows accessory for this kind of math. I've been helpless without > that hex/bin calculator for years. The memorization/concept isn't that > hard, though, and, really, CCxx's should, as advertised, be able to do this, > 'in your head'. > > Best, G. > > -----Original Message----- > From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] > Sent: Friday, March 02, 2001 4:27 PM > To: [EMAIL PROTECTED] > Subject: RE: HEX > > I never even knew the Windows Accessories calculator converted to hex! I > just do it manually. I have the following numbers and letters pretty much > memorized, so that helps. > > 10 = A > 11 = B > 12 = C > 13 = D > 14 = E > 15 = F > > 16^0 = 1 > 16^1 = 16 > 16^2 = 256 > 16^3 = 4096 > 16^4 = 65536 > > Figure out where the number they give you falls in the above list, for > example, is it between 256 and 4096? Or between 4096 and 65536? Divide by > the smaller of the numbers you select. Keep dividing the remainders until > you run out of numbers, (or can select the right answer, it is multiple > choice after all!) > > Here's an example: Convert 5555 to Hex. Easy! > > Divide 5555 by 4096 = 1, remainder = 1459 > Divide 1459 by 256 = 5, remainder = 179 > Divide 179 by 16 = B, remainder = 3 > Divide 3 by 1 = 3 > > Answer = 15B3 > > Note: a few things made this example easy. 5555 divided by 4096 is > obviously 1. 256 x 5 is obviously 1280. 16 x 11 is obviously 176. Often > it's much easier than it seems. (Sometimes, it's not and you just do brute > force.) > > Priscilla > > At 09:26 AM 3/2/01, Dale Frohman wrote: > >exactly. I had a friend who told me there was some HEX conversions on the > >BCMSN exam which i am scheduled to take in a couple of weeks. > > > >On Fri, 2 Mar 2001, Barronton, Ken wrote: > > > > > Because you can't use it during an exam. Real life...OK, exam...NO. > > > > > > -----Original Message----- > > > From: Nuria Canamares [mailto:[EMAIL PROTECTED]] > > > Sent: Friday, March 02, 2001 6:27 AM > > > To: 'Dale Frohman' > > > Cc: [EMAIL PROTECTED] > > > Subject: RE: HEX > > > > > > > > > Why don't you use the calculator of windows accesories? > > > > > > -----Mensaje original----- > > > De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]En nombre de > > > Dale Frohman > > > Enviado el: Jueves 1 de Marzo de 2001 3:24 PM > > > Para: [EMAIL PROTECTED] > > > Asunto: HEX > > > > > > > > > Does anyone have a way/tricks in remembering how to do HEX conversions? > > ________________________ > > Priscilla Oppenheimer > http://www.priscilla.com > > _________________________________ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _________________________________ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
