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Subj:.....Find The Missing Number II (S605)
          by Philip J. Carter and Kenneth A. Russell 
          From the book "IQ Test" on 8/6/2008 
             Published by Sterling Pub. Co., Inc., 2008 
             387 Park Avenue South, New York, N.Y. 10016 
             Test #2, Problem #37, Page 45 

What number should replace the question mark?

7, 11, 20, ?, 61, 97, and 146 
 
 
 
 

                THE SOLUTION

36.

The differences are: 2 squared, 3 squared, 4 squared,
5 squared, and 6 squared.
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