Posted by **Shadow** on Wednesday, September 29, 2010 at 8:51pm.

Make a conjecture about the next item in each sequence.

1.4,6,9,13,18

-I know that from 4 to 6 they added 2 and then from there each time the number you add is 1 more than the last one, but I don't know how to make a conjecture. Thanks

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