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January 17th, 2017, 11:32 PM   #1
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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
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January 18th, 2017, 01:25 AM   #2
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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.
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January 18th, 2017, 02:38 AM   #3
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$19, 13,$

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 $31$
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January 18th, 2017, 01:16 PM   #4
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Thanks... I got it finally.
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