Can anyone tell me a word in the English dictionary which has a silent 'z'?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What country can make you shiver?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Solve the mathematical equation in the picture below.

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

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

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