What always comes into a house through the keyhole?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

How can you make number one disappear by adding something to it?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you find the six hidden animals in the picture below?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

How can you take 2 from 5 and leave 4?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.