The outlier is 9, as it is farthest from the mean of all those numbers.
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It is 38.
-47, -41, -35, -29, -23, -17, -11, -5, 1, etc.
31, 37 and 41.
These are the composites between 31 and 41: 32, 33, 34, 35, 36, 38, 39, 40.
arrange the no. ascending and use the formula (n+1)/2=nth number...arranged no. :20 23 25 25 27 27 27 29 31 35 37 41 43n is the number of the numbers...substitute: (13+1)/2= 7th no. from the arranged numbers...so the answer 27