
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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April 16th, 2017, 08:02 AM  #1 
Newbie Joined: Jan 2013 Posts: 19 Thanks: 0  Can anyone here factor 100 numbers and spot all primes in 20 MINUTES?
Can anyone here factor 100 numbers and spot all primes in 20 MINUITS?....Grade 4 students are currently doing it now I can show u the simple manual method...If u wish..If not that's cool

April 16th, 2017, 09:18 AM  #2 
Senior Member Joined: Sep 2015 From: CA Posts: 1,297 Thanks: 664 
who cares

April 17th, 2017, 01:11 PM  #3  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,570 Thanks: 613 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan  
April 17th, 2017, 02:08 PM  #4 
Math Team Joined: Dec 2013 From: Colombia Posts: 6,876 Thanks: 2240 Math Focus: Mainly analysis and algebra 
I should think it very much depends on the size and quantity of the factors. I'm certain I could do numbers less than 200 in under 20 minutes, probably also numbers less than 1000. Numbers of the order of $10^200$ would probably defeat me, even if the factors were quite small.
Last edited by v8archie; April 17th, 2017 at 02:11 PM. 
May 4th, 2017, 09:16 AM  #5  
Newbie Joined: Jan 2013 Posts: 19 Thanks: 0  Quote:
 
May 4th, 2017, 09:17 AM  #6  
Newbie Joined: Jan 2013 Posts: 19 Thanks: 0  Quote:
 
May 4th, 2017, 09:17 AM  #7 
Newbie Joined: Jan 2013 Posts: 19 Thanks: 0 
Here is the solution https://m.youtube.com/watch?v=K9gKZNAWZ9M 

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100, factor, minuits, minutes, numbers, primes, spot 
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