By using 'because' continuously three times, can you make an English statement ?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

How is a fly different from a mosquito?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

How many times can you subtract the number two from the number fifty?

People make me, save me, change me, raise me. What am I?

What has many keys but can’t open a single lock?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

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?