Which Burger Is Different in below image?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What does below Rebus say?

XLR8

Replace the question mark with the correct number.

I’m tall when I’m young, and I’m short when I’m old. What am I?

There is a place where if I stand up straight, I will still be considered sideways.

Decode below three cipher riddles:

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

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?