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

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Find the missing number in the image below.

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

By using 'because' continuously three times, can you make an English statement ?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

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

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

10+10 and 11+11 can give you the same answer.

Explain how?

Why is 6 afraid of 7?