Math Is Fun Forum

jac

Member

Registered: 2009-10-30

Posts: 2

Help me with this serie

Hello everyone,
Please help me with this serie :

2, 3, 4, 15, 16

What would be the following number? and overall tell me how did you do it.

Thanks

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help me with this serie

Hi jac;

I like 17 for the next one. You have a group of 3 going up by 1 then it jumps by 11 so you get another group of 3 going up by one. Sort of like this:

2,3,4    15,16,17    28,29,30    41,42,43 ...

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

jac

Member

Registered: 2009-10-30

Posts: 2

Re: Help me with this serie

Thanks a lot.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help me with this serie

Hi Jac;

That isn't the right answer just my interpretation. And a weird one at that. Truth is those type of questions do not have an answer in the mathematical sense.

Last edited by bobbym (2009-11-01 11:49:53)

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Anakin

Member

Registered: 2009-10-04

Posts: 145

Re: Help me with this serie

Like Bobbym said, there could be other interpretations of this series.

For example it could be a group of 3 going up by 1 and then squaring the last number minus 1.

So 2,3,4
15,16,17
288,289,290
84099, 84100,84101