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

I can write cow in 13 letters.

Can You?

10+10 and 11+11 can give you the same answer.

Explain how?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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

What's the best place to go shopping in the ocean?

Which is the correct shadow of the bird?

Why Aeroplane windows are round?