the next number on the sequence

Find the next number in the sequence 1, 3, 8, 16, ___

i've been using arithmetic sequence and even geometric sequence i could not get the answer because it does not have a constant difference and ratio. please do help me on this. from the book it says 27 is the next... but i could not get the pattern.

Re: the next number on the sequence

Find the differences between adjacent numbers and then find the differences between those differences.

Re: the next number on the sequence

Quote:

Originally Posted by

**emakarov** Find the differences between adjacent numbers and then find the differences between those differences.

3-1 = 2

8-3 = 5 ... how is it done?

Re: the next number on the sequence

Quote:

Originally Posted by

**rcs** 3-1 = 2

8-3 = 5 ... how is it done?

Yes.

Code:

`1 3 8 16 27`

2 5 8 11

...

Now fill the third row.

Re: the next number on the sequence

Quote:

Originally Posted by

**emakarov** Yes.

Code:

`1 3 8 16 27`

2 5 8 11

...

Now fill the third row.

thanks