Decode below three cipher riddles:

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

How many letters are in the alphabet?

What is more useful when it is broken?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

What you cannot hold but it is yours?

Can you find the dog hidden in a group of pandas?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?