Question 1181008
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There is no math involved with this problem; it is only a guessing game.<br>
Any number in place of the "?" will make a valid sequence; it is impossible to know the "right" answer.<br>
You can spend a little time -- or a lot, if you want -- trying to find a logical answer... but it is a waste of time, because you can never know whether an answer you find is right.<br>