What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

In the picture given below, can you find out which digit will take place of the question mark?

Can you move 2 matchsticks to form four equal sized squares.

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

A father's child, a mother's child, yet no one's son.

Who am I?

What is at the end of a rainbow?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

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

Who am I?