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?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

What number divided by 4 is the same as that number minus 4?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Why Aeroplane windows are round?