I'm no expert but I think these puzzles sound like a fun challenge . For me, it's all about trial and error, trying different combinations until I find the right fit. The pizza puzzle is kinda weird though - how can you evenly divide slices when each person has different preferences?
omg these puzzles sound like a real brain twister i mean who doesn't love a good challenge right? but seriously, i'm not sure how even an expert like Ian Stewart could come up with this stuff... it's like they're designed to make you go "huh?" all day long lol. for me personally, the pizza puzzle is the one that has my attention - i mean who doesn't love a good slice (get it?) of pizza? but seriously though, rearranging those slices so each person gets an equal amount sounds like a tough nut to crack... fingers crossed i get a chance to try and solve them before 5 pm