What does this rebus riddle means ?

If 21x = 79x, what is the value of x?

Who are the happiest people in IPL match?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Find out the missing number in the picture attached:

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

Find the next number in the sequence

5 12 24 36 ?

Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must Birbal buy to silence Akbar?

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

which number am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?