A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What demands an answer, but asks no questions

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

A sundial has the fewest moving parts of any timepiece. Which has the most?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

What is the next number in this series?

4,12,84,3612....

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.