I started collecting these puzzles because I liked solving them and I got tired of “Puzzles” books that have 43 versions of the same puzzles, like, “Mary is six years older than her sister Beth, who is half the age of . . .” Those get boring very quickly. The puzzles below are hopefully just beyond what you’re easily able to do. Let me know if you have more of the same kind.
Some of these I made up, some I give credit for, and most I don’t know the origins of. If you know, please tell me.