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?

Solve this riddle by finding the odd one out from the rest.

What is the word or phrase below?
R | E | A | D

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

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

What do you get if you add 2 to 100 four times?

With the help clues provided in the image, can you find the 5 digit key?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.