What has to be broken before you can use it?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What is full of holes but still holds water?

Buy me, smell me or deliver me, I do not change.

Who am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?