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?

Can you name some countries which do not have the alphabet 'A' in them?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Why is the Hole below a Lock?

You need to arrange three 7 and mathematical symbols to form number 1?