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March 31st, 2017, 03:34 AM  #1 
Newbie Joined: Mar 2017 From: Greece Posts: 1 Thanks: 0  Need help with this sequence
123456789, 21230569, 26054, 1204, x I need to find what's next (x) Any help appreciated. Last edited by skipjack; March 31st, 2017 at 06:03 PM. 
March 31st, 2017, 04:40 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 9,065 Thanks: 621 
Are you serious?!

March 31st, 2017, 05:28 PM  #3 
Newbie Joined: Mar 2017 From: Minnesota, USA Posts: 6 Thanks: 0 Math Focus: All  Last edited by skipjack; March 31st, 2017 at 06:02 PM. 
April 2nd, 2017, 04:20 PM  #4 
Senior Member Joined: Oct 2013 From: New York, USA Posts: 507 Thanks: 74  
April 19th, 2017, 03:10 AM  #5 
Newbie Joined: Apr 2017 From: durban Posts: 9 Thanks: 0 Math Focus: Algebra 
X = T5 T1 = 123456789 D = T2  T1 D =102226220 T5 = a +4d = 123456789 + 4(102226220) 123456789  408904880 X = 285448091 
April 19th, 2017, 01:20 PM  #6 
Global Moderator Joined: Dec 2006 Posts: 16,944 Thanks: 1255 
That makes no sense. There must be something other than just addition or subtraction behind this puzzle. It must be more like solving a crossword clue, but based on numbers rather than letters.


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