What number when divided in half becomes zero?

Which five letter word can be added at the end of below word to form a
valid word?

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

What is the difference between a jeweller and a jailer?

What am I?

I always drive my customer away.

Who am I?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

John was piloting a plane behind a car but was never able to overtake it. Why?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?