
Math General Math Forum  For general math related discussion and news 
 LinkBack  Thread Tools  Display Modes 
January 5th, 2017, 07:39 PM  #1 
Newbie Joined: Jan 2017 From: Nowhere Posts: 1 Thanks: 0  My Teacher Isn't Believing Me That He Did His Binary Wrong
For the number 356 to binary, I got "101100100" and I used several different online converters to confirm, and did a trick that my teacher taught me awhile back. He used the Windows 10 calculator and the divide method and got "001011010" but with his, it isn't converted properly because the 8th and 9th number has to be less than 128. I did my method on the test and I know he's going to mark them wrong. Am I correct? 
January 6th, 2017, 06:36 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 16,782 Thanks: 1238 
You are correct if the number 356 is decimal. The binary number 001011010 corresponds to the decimal number 90.

January 6th, 2017, 08:21 AM  #3 
Newbie Joined: Mar 2016 From: UK Posts: 20 Thanks: 1 
For the binary number you have: 101100100 The LSB (Least Significant Bit  Rightmost Number) is 1 in decimal, followed by 2, 4 etc. Your MSB (Most Significant Bit  Leftmost Number) is 256 in decimal. Therefore you have, 4 + 32 + 64 + 256 = 356. Your answer is indeed correct. The values for each bit come from the base of the number, take 1001 in binary for example. In decimal it is: $\displaystyle 1\times2^0+0\times2^1+0\times2^2+1\times2^3= 1\times1+0\times2+0\times4+ 1 \times 8=9$ 

Tags 
believing, binary, teacher, wrong 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
A teacher marked my quiz answer wrong Help  wizard1969  Algebra  35  April 3rd, 2016 08:06 PM 
having trouble believing combinations  NotYoung  Algebra  3  March 13th, 2014 06:22 PM 
My teacher is wrong, RIGHT?  yogazen2013  Algebra  2  August 26th, 2013 02:49 PM 
Help me prove my teacher wrong!  michaelodeon  Advanced Statistics  5  February 1st, 2010 07:04 AM 
Help! Is my son's teacher wrong?  NatvAmer  Algebra  2  May 7th, 2009 05:56 PM 