Darren, you made us think, lol, but I am lazy to think now,leh... :)
Anyway, thanks for making me smile today, :)

I haven't seen this one in years! :)

Hmmmm.

AND NO FAIR GOOGLING EITHER! lol

I know this one, and have used it in classes I have taught. You have to think "outside the box" that the 9 dots creates in your mind. I actually DID figure it out myself, the first time I was challenged with it, but I won't spoil the fun my posting the answer.

I have seen it before, but I can't remember the how anymore:), you surely kept me busy thinking the last few minutes:))

I could never do this, I'll wait for your answer!

Always liked this one and have used it before

I know this one. I remember trying this once, it took me hours to figure it out. I finally did it, because I didn't give up. I know there's a lot of people out there that can figure it out it minutes. Lol... I love stuff like this. :)

The problem is not well formulated: what is the definition of being connected? There are multiple solutions..