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?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

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

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

How can one talk without saying a single word?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

Spot what is wrong here in below Picture?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?