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

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

What's the only room from which no one can enter or leave

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

No matter how little or how much you use me, you change me every month. What am I?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

What does this rebus mean?

O
N
C
E
TIME