Which alphabet letter is a question?

Find the hidden panda in the image below.

Decode below three cipher riddles:

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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

How many times can you subtract the number 5 from 25?

Who can jump higher than a Mountain?

I have feet, but no legs. Which animal Am I?