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

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What has 13 hearts but no other organs?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

How many letters are in the alphabet?