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?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Rearrange the letters in "new door" to make one word.

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

Which flower has two lips?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Be active and find the killer in the picture Riddle below.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?