Scroll down for the answer to the facebook riddle/puzzle
Mixed Quiz
Which gas is most commonly used in lightbulbs?
Which famous ship was found in 1985 after being lost since 1912?
What is the term for animals that eat only plants?
In which city would you find the Acropolis?
Which chemical element is represented by the symbol 'Fe'?
What is the capital of Argentina?
Which number is represented by the Roman numeral 'L'?
Which painter is famous for cutting off part of his own ear?
Which desert covers much of northern Africa?
What is the name of the first Harry Potter book?
Answer riddle/puzzle:
the missing number is 2