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

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

Take away the whole and some still remain. What is it?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What question can you never answer yes to?