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January 18th, 2017, 12:32 AM  #1 
Newbie Joined: Jan 2017 From: Canada Posts: 2 Thanks: 0  sequence of number
Hi Can you help to find the next number for this sequence : 19 13 23 22 27 31...? I have been trying since last week. Thanks 
January 18th, 2017, 02:25 AM  #2 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 1,988 Thanks: 646 Math Focus: Physics, mathematical modelling, numerical and computational solutions 
I think the pattern is: First two terms are 19 and 13. Subsequent odd terms: Add 4 to last odd term Subsequent even terms: Add 9 to last even term The next number in the sequence is the seventh term (and odd term). Therefore the next number is 31, because we add 4 to 27. 
January 18th, 2017, 03:38 AM  #3 
Member Joined: Sep 2016 From: India Posts: 88 Thanks: 30 
$19, 13,$ Now, add $4$ with $19$ $19+4=23$ $19, 13, 23$ Next, add $9$ with $13$ $13+9=22$ $19, 13, 23, 22$ add $4$ with $23$ $23+4=27$ $19, 13, 23, 22, 27$ add $9$ with $22$ $22+9=31$ $19, 13, 23, 22, 27, 31$ add $4$ with $27$ $27+4=31$ $19, 13, 23, 22, 27, 31, 31,...$ Thus, next number is $31$ 
January 18th, 2017, 02:16 PM  #4 
Newbie Joined: Jan 2017 From: Canada Posts: 2 Thanks: 0 
Thanks... I got it finally.


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