Teaching hex/binary/octal/radix part 2

[golnar]

thanks, BUDD-AY!!

[JandRLPs]

I got all of them but the last one right. I sat there for a good 10 minutes before I realized hex was base 16 and not base 6

[taralbush]

Thanks! I shared this with my class- Computer System Architecture. It helped alot!! We appreciate your efforts.

[Shadowlit001]

Are there formulas to go straight from octal to hex and vise versa or do you have to go from octal to decimal to hex or hex to decimal to octal?

Also, is there a formula for multiplying octals(or hexs) with one another or do you have to convert to decimal(or binary) and back again to get the answer?

[acidfingers]

I don't know of any easy way to convert directly from hex to octal or vice versa. There may be some clever way, but I can't think of any off the top of my head.

As far as the multiplying, there are some ways I believe, but they're much different than how we normally perform multiplication on decimal numbers. So I bet it would end up being easier to just convert to decimal and then do the multiplication and convert it back. (That is, unless there's some clever method someone knows out there)

[TheILLTechnics]

yo, you look tired. get some rest h4ck3r dude.

[tankak47]

WOW! im impressed! sitting here reading my network intrusion detection book and couldnt figure out for the life of me how octal worked exactly, I THOUGHT I WOULD NEVER GET IT!

but seriously like 10 mins.

lets see if i can get it..

580dec=1104oct

100oct=64dec

223oct=147dec=93hex

lol that was a nice use of like 10 mins of fingers and scratch paper, but i hope to catch a better grasp soon.

thanks alot! really helped me out

[acidfingers]

Great, looks like you got it all right! Glad I could help you with understanding this octal business :D

[mgsucks]

an $80 text book and a lecturer couldn't explain this to me and thanks to this vid i've learnt it in 10 minutes, cheers man

[acidfingers]

Awesome, I'm glad to hear that this helped you! Go go math :)

[carlosav]

580dec=1104oct,100oct=64dec,22­3oct=147dec=403hex

am i right?

[acidfingers]

Close! You were right on all except for the last one.

223 octal = 147 decimal = 93 hex

You get the dec->hex by (16*9) + (1*3)

1 and 16 being the two different digit multipliers like 1 and 8 are with octal.

[alamo11]

thanks for this video. My son is trying to learn this subject and I said for a challenge I would try and learn as well

[thoughtssopoetic]

zomg, you are amazing.

i understood most of this, which made me happy.

<33333

[abdulden2]

Yo!

You need to do some more of these videos, very helpful.

[amjPeace]

You are a gifted teacher. Think of the fun you would have doing this lesson with a grease pencil and an overhead projector for a whole class of students! Here's a fun challenge: Guess the base value of the number "23" if it equals 19 in decimal. Keep smilin', annie, your newest subscriber. XXOO

[acidfingers]

well, the 3 must equal 3 regardless of base, so 19-3 leaves us with 16. We have 2 in the next position, so 16/2 is 8! this means the base must be 8 :D

Thanks for subscribing! I'll subscribe to you in hopes that you eventually get your camera and make some videos :)

[amjPeace]

Seriously, there's a tremendous need in this world for good math teachers, and you're so good at it that you could actually train others how to teach math!

[kim515no2]

Great vids acid.

I learned something new today.

Thank you.

Sphinx

[superbunny414]

I just watched your videos. My dad is a computer programmer and he tried to explain this to me, but i didn't get it. Maybe you explained it alot easier or maybe i was not smart enough to figure it out three years ago. Anyways i think i got the right answers 580=904 in octal, 100 in octal=64, 223 in octal=147 in decimal=93 in hex. Did i get the right answers? i Also want to know how they get the words in the lonly girl viedos.

[irenedirks]

well anyway

when do you really use this hex and octal???

I know binary is used in computers but are hex and octal too???

don't know

anyway

GET SOME SLEEP!! you look like crap!!!

thanks for the explaination

bye

[acidfingers]

They're both used in computers. In an average day you probably won't use hex and octal if you're not a programmer.

[irenedirks]

ok but then how do you make words out of hex codes???

you know like they do at the lonelygirl15 stuff???

if it's higher then 9 then it's an A but what about all the other letters of the alfabet

wouldn't it just be easier to make your base 26 (1 for each letter) and then translate each number to it's letter

like 13 is M

so if your answer is 8 5 12 12 15 would make hello

or something

[Cynicar]

You seriously do an awesome job of explaining this. Fo' Realz yo.

[brookeormian]

This was great, pretty straightforward and easy to catch on to :) Thanks!

[anakissm]

humm well i have almost no idea what your talking about but you look real fucking tired to me so im guessing your tired because you learned all that stuff.

[acidfingers]

haha, I'm just tired because of school :)

I've known this stuff for a while now. It's just really hard to teach people this stuff since you pretty much have to get people to unlearn what they know about numbers and think about them a whole new way.

[Shaylob]

All righty, the first video was pretty easy, this one I actually had to think. GOOD JOB!

[mourningbelle]

Acid, you're awesome. <3