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?

If six children and two dogs were under an umbrella, how come none of them got wet?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

What has lots of eyes, but can’t see?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How can you make a TV, a bed, a dog, and a car liquid?

What has no start, end, or centre?