SOLUTION: in a cercle i have 8 numbers, a mystery number then 26, 6, 21, 1, 36, 16, and 16. What is the mystery number?

Question 623187: in a cercle i have 8 numbers, a mystery number then 26, 6, 21, 1,
36, 16, and 16. What is the mystery number?
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
The numbers are...
26, 6, 21, 1, 36, 16, 16, ...
If you take the numbers in pairs, like this...
(26, 6), (21, 1), (36, 16), (16, ?) you can see that the second number in each pair is the result of subtracting 20 from the first number of the pair.
So for the last pair, (16 - 20) = -4
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