Logic Riddles

Question: Which kind of board can you use to insert letters?

Question: I'm very very strong but always hidden, eventually, my time will come and I'll fit in, what am I?

Question: A deaf man steals a blind man's car. The only person who sees it is a dumb man (he is unable to talk).

How does he tell the blind man his car was stolen without the use of sound?

Question: A guy writes in his journal. He writes "Hey, journal, today I... 'Dinner is ready!' Is what his wife said." But the guy had no wife. How is this possible?

Question: What person sees a funny action and hears a funny word but cannot laugh?