Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

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

Can you divide the below-given shape into four equal and identical pieces?

Can you find the key in the picture below?

Can you find the missing piece of the Porsche?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

What does this mathematical rebus means ?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?