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

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

What breaks yet never falls, and what falls yet never breaks?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

Can you place three balls such that the equation shown in the picture holds true?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Can it be possible to build a house that has all its four walls facing towards the South?

Can you find the 09 errors in the picture below?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?