Which tank will fill first?

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?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What Adam and Eve do not have but the rest of the people have?

Where do you go to learn how to make ice cream?

Imagine you are in a room with no windows or doors. How will you get out?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

Can you replace the question mark with the correct number?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?