How is the moon similar to a dollar?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What has to be broken before you can use it?

Can you count the number of quadrilaterals in the picture below?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

what does the below math rebus puzzle mean?

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?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?