Replace the question mark with the correct number in the below-given picture?

Replace the alphabet with the number such that the below equation holds.

HAPPY
+ DIWALI
--------------
HDLALA
--------------

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Why is Saturday stronger than Monday?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I have branches, but no fruit, trunk or leaves. What am I?