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Search options not deleted user 20085

A puzzle in which the hidden pattern behind a given sequence of numbers (and, often, the next term) is to be found. Use with [sequence]

4 votes
1 answer
1k views

Fill the missing number puzzle

I have this puzzle that none of my colleagues (including me) can figure out and I can't sleep because of it :). Can someone please help: Thank you.
Radoslav.Ivanov's user avatar