Could somebody collate all previous postings and produce a 1 - 100 list (which is probably possible) of the questions and clues/answers. It is obviously asking a lot to expect people to look through previous postings.
Magic 1,
Or better still ask quiz compilers to include the answers with the questions and ask entrants to not look at the answers unless they have really really tried for at least 30 seconds to do one themselves.
Or they could pitch their questions at a different level,like: Man's best friend,has four legs and goes woof (3).