Answer:
I can fall off a building and live, but in water I will die. What am I?
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
A prisoner is told 'If you tell a lie we will hang you if you tell the truth we will shoot you.' What can the prisoner say to save himself?
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
What happens once in June twice in August and never in May?
A little house full of meat, no door to go in and eat.