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

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

The more it dries, the wetter it becomes. Can you tell what it is?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?