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"Do not worry about your difficulties in mathematics, I assure you that mine are greater." (Albert Einstein)
Today's Foxtrot
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bperry
Posted 10/15/2006 11:00 AM (#1182)
Subject: Today's Foxtrot


Math

Posts: 281
100100252525
Location: Henry Clay		Foxtrot today was a mathematical sudoko or "sudorko"



(FoxTrotSudorko.gif)



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Attachments FoxTrotSudorko.gif (51KB - 381 downloads)
rgoin
Posted 10/16/2006 6:25 PM (#1187 - in reply to #1182)
Subject: RE: Today's Foxtrot


Math

Posts: 108
100
Location: Henry Clay		My calc kids loved this one. I even got a refresher course in converting hexadecimal and binary numbers!
ldewees
Posted 10/25/2006 11:40 AM (#1206 - in reply to #1182)
Subject: RE: Today's Foxtrot
Math

Posts: 55
2525
Location: Henry Clay		I dare to ask, what is FF-F8?
rtallent
Posted 10/25/2006 11:45 AM (#1207 - in reply to #1206)
Subject: RE: Today's Foxtrot
Math

1001001002525
Location: Retired FCPS, Current UK and Transy		7 if I remember correctly. Hexadecimal uses characters 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.

So FF-F8 = 7?

Anybody feel free to correct me if I am wrong.

Edited by rtallent 10/25/2006 11:46 AM
szehnder
Posted 11/1/2006 3:02 PM (#1250 - in reply to #1182)
Subject: RE: Today's Foxtrot


Math

Posts: 58
2525
Location: PL Dunbar		I think that's correct...I know that the hexidecimals use letters...makes sense to me!
scombs
Posted 11/3/2006 4:20 PM (#1272 - in reply to #1182)
Subject: RE: Today's Foxtrot
Math

Posts: 104
100
Location: Henry Clay		That is correct on the hexadecimal number.
This is a base 16 system with the base 10 numbers 10, 11, 12, 13, 14, and 15 represented by A, B, C, D, E, and F respectively. The place values then are the 16's place and the 1's place. Thus the number 10 in Hex is equivalent to 16 in base 10. AB would be 10*16 + 11*1 or 171. Then FF is 15*16 + 15*1 and F8 is 15*16 + 8*1. That is 255 - 248 = 7.
One common use of hex numbers is in color codes used in computer applications. Computers create colors by using combinations or Red, Green and Blue. The intensity of each color is on a sliding scale from 0 to 255 and these numbers are shown as two digit hexadecimal numbers. Each color the computer can show then can be represented with a six digit number where the first two digits give the intensity of red, the next two numbers for green and the last two numbers for blue. Thus, "000000" is the number (or code) for black. It is basically 00 for red green and blue. "FFFFFF" is the number (or code) for white. It occurs when all three colors are at their maximum level of 255. Every other color is something in between these.
scombs
Posted 11/3/2006 4:21 PM (#1273 - in reply to #1182)
Subject: RE: Today's Foxtrot
Math

Posts: 104
100
Location: Henry Clay		By the way, I used this with my Calculus class today and they really liked it.
rgoin
Posted 11/4/2006 12:05 PM (#1276 - in reply to #1182)
Subject: RE: Today's Foxtrot


Math

Posts: 108
100
Location: Henry Clay		I will admit that my calculus kids had to explain to me how to do the hexadecimal and binary conversions. One of those things I never learned!
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