What number when divided in half becomes zero?

I shave every day, but my beard stays the same. What am I?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

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?

What can you see in the middle of March and April that you can never see in any other month?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

In the four images below, can you find the odd one out?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?