
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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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: 20,288 Thanks: 1968 
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: 13,964 Thanks: 991 
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: 896 
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: 1,306 Thanks: 549  Quote:
$20000 < 21904 < 22000 \implies$ $\dfrac{20000}{2} < \dfrac{21904}{2} < \dfrac{22000}{2} \implies$ $10000 < \dfrac{21904}{2} < 11000.$  

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complete, divison, divisor, number 
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