Answer:
What was the longest river in the world before the Amazon River was discovered?
How do you blink twice without blinking twice?
What coin doubles in value when half is deducted?
A bike rider is traveling north at 25 mph, a car passes the bike rider going north at 40 mph. At the same time the bike rider passes a jogger running north at 5 mph. Which will move away from the bike rider at a faster pace, the car or the jogger?
How do you make the number one disappear by adding to it?
My days are numbered. What am I?