What work can one never finish?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

What's the best place to go shopping in the ocean?

What jumps when it walks and sits when it stands?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I look at you, you look at me, I raise my right, you raise your left. What am I?

What number divided by 4 is the same as that number minus 4?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?