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

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

What can you hold in your right hand, but never in your left hand?