Logic Riddles

Question: A shield can reflect projectiles which travel at 4/5 of their original speed after being reflected. A missile is shot towards the shield at 700 km/h. At what speed did it go after its reflection?

Question: Which tool doesn't have a licence, but drives.

Question: How do you make seven even?

Question: 5 men go skydiving but when they jump out of the plane, only 4 men have a parachute. How do they all survive?

Question: What is AD before BC, exams before tests and last year is after last month?