
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
July 9th, 2017, 12:03 AM  #1 
Newbie Joined: Jul 2017 From: pakistan Posts: 3 Thanks: 0  Complete divisor of a number
Hi all, I am having such a naïve problem, yet unable to comprehend it now: $\displaystyle 21904/2 $ should come out to be $\displaystyle 1952 $ plainly, but calculator suggests it to be $\displaystyle 10952 $. What's the rule here? Last edited by skipjack; July 9th, 2017 at 01:07 AM. 
July 9th, 2017, 12:25 AM  #2 
Newbie Joined: May 2017 From: California Posts: 15 Thanks: 1 
If 21904/2 = 1952, then 1952(2) = 21904, but that isn't true. 21904 / 2 = 10952 is true though because 21904 = 10952(2). I think you may have forgot a 0 somewhere in your solution, because 1952 and 10952 are similarlooking. Last edited by skipjack; July 9th, 2017 at 01:07 AM. 
July 9th, 2017, 05:42 AM  #3  
Newbie Joined: Jul 2017 From: pakistan Posts: 3 Thanks: 0  Quote:
What's the rule for it? Why "Zero" comes in quotient while there isn't a need?  Album on Imgur Last edited by skipjack; July 9th, 2017 at 06:04 AM.  
July 9th, 2017, 06:11 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 19,865 Thanks: 1833 
There is a need. When 1 and 9 are brought down, the 0 is because the 1 isn't large enough to have a nonzero multiple of 2 subtracted from it. Subtracting a zero multiple of 2 is omitted (as subtracting zero has no effect), but 0 has to be entered in the quotient.

July 9th, 2017, 06:17 AM  #5 
Newbie Joined: Jul 2017 From: pakistan Posts: 3 Thanks: 0  
July 9th, 2017, 10:48 AM  #6 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,445 Thanks: 946 
4 divided by 7 = 0 remainder 4 May I ask: are you serious? 
July 29th, 2017, 05:04 AM  #7 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,261 Thanks: 894 
Long division is typically taught in fourth or fifth grade, to 9 or 10 year olds. Of course, we have no way of knowing how old you are.

July 29th, 2017, 01:42 PM  #8  
Senior Member Joined: May 2016 From: USA Posts: 1,186 Thanks: 489  Quote:
$20000 < 21904 < 22000 \implies$ $\dfrac{20000}{2} < \dfrac{21904}{2} < \dfrac{22000}{2} \implies$ $10000 < \dfrac{21904}{2} < 11000.$  

Tags 
complete, divison, divisor, number 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Odd perfect number divisor question  Decave  Number Theory  16  July 20th, 2014 12:56 PM 
Greatest Common Divisor may be NP Complete (if so then P equals NP)  BenFRayfield  Number Theory  1  June 16th, 2014 11:09 PM 
Number of positive divisor with gcd condition  thippli  Number Theory  2  October 26th, 2012 08:47 AM 
Sum of divisor problem  brangelito  Number Theory  8  May 3rd, 2012 06:19 PM 
p is a divisor of (p1)!+1 if p is a prime number  gabor7896  Number Theory  1  October 15th, 2009 12:07 PM 