If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Decode below three cipher riddles:

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

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What am I?

What do you think with the below Picture ?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

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?