too early for me!
Tease Dat Brain! What’s the answer: I’ll explain later, so don’t post your reasons, just your answers
Update 4/21: There’s 1 mathematical formula answer so far. The rest are patterns. So far 1 pattern seems to be most popular.
Update 4/17: There are at least 2 correct answers that can be proved. So everyone, if you post a number that hasn’t yet been posted, tell us why as well. Maybe there’ll be more than 2 answers…
Thanks to SMS