Posted by **Elizabeth O'Loughlin** on Sunday, February 13, 2011 at 4:39pm.

Find the missing numbers to complete the patterns. Some are arithmetic and some are geometric. State the commom differences or common ratio.

1) 1,2,___,___,___,32

2)800,80,8,0,8,0.08,___,____

Some tricky ones that don't follow the "rules."

1)17,15,25,23,33,31,_____,____.

2)3,6,7,14,15,30,31,____,____.

3)1,6,5,10,9,14,13,___,___.

Please Help! I was not in class for this! A.S.A.P.! thank you!

- math -
**tchrwill**, Sunday, February 13, 2011 at 6:04pm
The first is not that obvious unless you are familiar with powers of 2.

As for the second one, divide the terms by the previous term and you will have your ratio.

The third requires a little mental gymnastics before the pattern will become obvious. Starting with the 2nd term, down 2, up 10, down 2, up 10, etc.

I'll let you play with the other 2.

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