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?

I can be cracked, made, told, and played. What am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

How many words can a pen with half refill write?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Where do fish keep their money?

What does it mean?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

What is so fragile that saying its name breaks it?