May 7th, 2019, 07:21 AM  #21 
Newbie Joined: Oct 2017 From: Egypt Posts: 14 Thanks: 0 
The given is three factors only

May 7th, 2019, 07:24 AM  #22 
Global Moderator Joined: Dec 2006 Posts: 20,746 Thanks: 2133 
The proof you provided was for question (7) and it considered successive pairs. Which question gives only three factors (no "..." to indicate further factors)? 
May 7th, 2019, 07:50 AM  #23 
Newbie Joined: Oct 2017 From: Egypt Posts: 14 Thanks: 0 
I explain no.7 because my friend in school asked me to solve it but in my proof i answered that if we get only three factors like no.8 we able to solve it in convenient way and the student able to understand it
Last edited by yoyo145; May 7th, 2019 at 08:04 AM. 

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