A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

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

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

What does this rebus means ?

PROG WORKRESS

What is the last thing you take off before bed?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?