Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

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

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Can you find a number that lies one third of the distance between 1/3 and 2/3?

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

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What has to be broken before you can use it?