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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

How many triangles can you count in the figure given?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Find out the number of circles in the given picture having Illusion

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

During which month do people sleep the least?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle: