There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What breaks yet never falls, and what falls yet never breaks?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Replace the question mark with the correct number.

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

They are three errirs in this question. Can you find them?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?