# 11, 22, 13, 26, 15, 30, 17...What's next?

11, 22, 13, 26, 15, 30, 17...What's next?

Okay, so far I have tried to find the rule but I could not get the pattern.

11, 22 } +11

22, 13 } -9

13, 26 } +13

26, 15 } -11

15, 30 } +15

30, 17 } -30

WTH is the pattern!!!???

I have been stuck on this question for 30 minutes. I need help finding the pattern. Thanks!

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11 doubled is 22

13 doubled is 26

15 doubled is 30

17 doubled is 34

they are taking the odd numbers starting at 11 and doubling them

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11 22 13 26 15 30 17

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11-13 is 2. 13-15 is 2.

22-26 is 4. 26-30 is 4

30+4 is 34

then 17+2 is 19

So 34 and 19

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11*2 = 22

13*2 = 26

15*2 = 30

17*2 = 34

The sequence is made up of two arithmetic sequence joined together

11, 13, 15, 17......Common difference = 2

22, 26, 30, 34......Common difference = 4

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11, 13, 15, 17, ... are odd numbers

22, 26, 30, ... are 11×2, 13×2, 15×2, ...

so the sequence is

11, 22, 13, 26, 15, 30, 17, 17×2, 19, 19×2, 21, 21×2, ..

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34.

The pattern is 2x and -9.

2(11) = 22

22-9 = 13

2(13) = 26

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You are almost right just see that one term predicts not only next term but one more subsequent.

11 gives 2*11 as next and and 11+2 as well

Then

11+2= 13 gives 13*2 = 26 and next 13 +2 = 15

Similarly 15 gives you 2*15 = 30and next 15+2 = 17

So next numbers are 34 and 19 next 38 and 21

42 and 23 and so on

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34 is next.

The pattern is every other number doubled:

11x2=22

13x2=26

15x2=30

17x2=34

The pattern continues by adding two to the base number:

19x2=38

21x2=42

23x2=46

You can also solve by just adding 4 to every other number:

22,26,30,34,38,42,46,50,54,etc

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+1 vote