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?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

In the image given, you can find several triangles. Can you count them all?

I know a nine-letter word having only one vowel.
Do you ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?