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?

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

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

There is a place where if I stand up straight, I will still be considered sideways.

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

What word is pronounced the same if you take away four of its five letters?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?