No one wants to have it, but if one got it, he does not want to lose it. What is It?

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 ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

81 x 9 = 801. What must you do to make the this equation true?

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

which number am I?

Which is heavier: a ton of bricks or a ton of feathers?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

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

why number 8549176320 is one of a kind?

What does the below image rebus riddle means ?