What is the below Rebus indicate?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Keyboard words are not in alphabetical order, Why?

Solve the puzzle by telling what does below picture means.

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Solve the equation in the image by looking at the pattern closely.

Why do we preferably have round manhole covers and not square ones?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?