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

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

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

What's the only room from which no one can enter or leave

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

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?