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?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Find the smallest sentence with all the English alphabet.

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?