I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

What is the Surname of Barbie Doll?

Can you solve the maths in the below-given picture equation?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

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

Aaron, Brad, Christopher, Danny and Elvis decided to play a game of tiddlywinks. In this game they decided that one win will get 1 point for winning, 0 for losing and 1/2 in case of a tie.

They finished the game in alphabetical order and it was found that the scores were different for each person.

Based on the following two statements, can you find out the result of the individual games?
Brad: No one could finish like me, without a loss.
Elvis: No one played worse than me, I finished without a single win.

How many times can you subtract the number 5 from 25?

Which country gets ill every time?