-=> Roger Nelson wrote to Roy Witt <=-

 RN> On Tue May-17-2011 12:51, Roy Witt (1:387/22) wrote to Roger Nelson:

 RW> 17 May 11 07:23, Roger Nelson wrote to All:

 RN> Which number should logically replace the question mark?

 RN> 7, 11, 20, ?, 61, 97,

 RW> I don't have enough toes to figure this one out.

 RN> LOL!  I'd be lying if I said I had figured it out, but I looked it up
 RN> and the answer is 36, which I still don't understand.  It will come to
 RN> me sooner or later when I have a better understanding of the question.

It's a function of squares...

7 + 2^2 = 11
11 + 3^2 = 20
20 + 4^2 = 36
36 + 5^2 = 61
61 + 6^2 = 97

 
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