Riddles and Brainteasers

(TESOL Worksheets--CLIL, Comprehensible Input)
Google: slides, pub
[Notes: I was teaching a unit out of a textbook that was focusing on brainteasers and problem solving, so for added practice, I went through my all 3 of my joke collections (part 1, part 2, part 3) and pulled out all the riddles and brainteasers from those slideshows.  I did my best to try to ignore the puns, and only focus on the riddles that involved logic, but I couldn't resist leaving a couple puns in there.
I'm unsure as to how to classify this.  It was supposed to be teaching critical thinking skills, so I guess I'll index it with my CLIL materials (under critical thinking) and also my comprehensible input materials.