Question 1166563
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Put in any number you want -- it will be a valid answer.<br>
Any problem like this is invalid; there is no way to know the "right" answer.<br>
Given any sequence of numbers like this, there are many different mathematical patterns that will produce the sequence -- and undoubtedly many other patterns that are not mathematical.<br>
So spend as much (or as little) time as you want trying to find a logical answer -- knowing that any answer you come up with might not be "right".<br>