What is the world´s longest river?
Amazon
Name the 3 primary colours
Red, yellow, and blue
How many teeth should an adult human have?
thirty-two
What is the largest organ of the human body?
Skin
Which country has the most people?
China
How many legs does a butterfly have?
six
Which is bigger, a lake or an ocean?
Ocean
In which sport was Muhammad Ali the world champion?
Boxing
How many rings are there in the Olympic Games Symbol?
five
In boxing, What do the letters K.O stand for?
Knock out
