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January 26, 2015

January 26, 2015

Posted by **Marty (F)** on Monday, March 19, 2012 at 3:27am.

- arithmetic -
**Steve**, Monday, March 19, 2012 at 1:30pmIf the sequence is 20 x y 28 ... then

y = (20+x)/2 = 10 + x/2

28 = (20+x+y)/3 = (20+x+10+x/2)/3 = 10+x/2

18 = x/2

x=36

y=28

20 36 28 28 28 28

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