There was an aeroplane crash, every single person died, but two people survived. How is this possible?

There is a place where if I stand up straight, I will still be considered sideways.

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?