Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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?

Which is the smallest number that you can write using all the vowels exactly once?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What jumps when it walks and sits when it stands?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What will you call your mother's brother's brother-in-law?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

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 ?