
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
April 16th, 2017, 08:02 AM  #1 
Newbie Joined: Jan 2013 Posts: 16 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: 1,199 Thanks: 611 
who cares

April 17th, 2017, 01:11 PM  #3  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,555 Thanks: 597 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan  
April 17th, 2017, 02:08 PM  #4 
Math Team Joined: Dec 2013 From: Colombia Posts: 6,672 Thanks: 2171 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: 16 Thanks: 0  Quote:
 
May 4th, 2017, 09:17 AM  #6  
Newbie Joined: Jan 2013 Posts: 16 Thanks: 0  Quote:
 
May 4th, 2017, 09:17 AM  #7 
Newbie Joined: Jan 2013 Posts: 16 Thanks: 0 
Here is the solution https://m.youtube.com/watch?v=K9gKZNAWZ9M 

Tags 
100, factor, minuits, minutes, numbers, primes, spot 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Find the factor of two primes knowing the product  Aleph6  Number Theory  3  November 11th, 2016 08:06 AM 
the numbers of primes  Albert.Teng  Algebra  1  November 17th, 2012 08:28 PM 
Even numbers as sum of 4 primes  kulix  Number Theory  10  February 19th, 2012 11:26 AM 
Algorithm to factor numbers  Pueo  Number Theory  11  March 2nd, 2010 03:26 PM 
Factor 2 into primes in Z[i].  alpah  Number Theory  2  November 21st, 2006 10:26 AM 