Now Google shows direct answers for even more complex questions, but this seems to be limited to the US. Here's an example of question that doesn't have a definitive answer: "what's the distance between Earth and Mars?". I picked a shorter version of the query: "distance to the Mars." Google shows a snippet from a page that answers the question and highlights the distances. Usually, the page is in the first 10 search results and Google shows an extended snippet.
Here's another question: "why is the sky blue?".
Why is the Red Sea called this way? Google has the answer.
Google also answers: "how many work days in a year?", "who owns Lancia?", "who ended world war 2?", "who celebrates presidents day?", "how many countries are there?".
The answers aren't always accurate and sometimes they're incomplete (Will Smith has 3 kids):
While Google's quick answers are often useful, it's a good idea to check if they're accurate.