Harry Reid says Trump would fail the US citizenship test - would you?

Nearly every one of them would've had to pass a civics test, answering questions about US history, government, and geography.

The test became a campaign topic on Monday when Senate Minority Leader Harry Reid challenged Republican candidate Donald Trump to take it.

Reid - who was responding to Trump's plan to admit a kind of ideological test to immigrants - brought this up because he's certain Trump would fail, "given his general ignorance and weak grasp of basic facts about American history, principles and functioning of our government."

The test itself isn't a huge hurdle, provided that you take some time to prepare. The questions are chosen out of a pool of 100 possible queries, which are publicly available.

Applicants are asked 10, chosen at random, and have to answer six correctly.

And they get a second chance if they fail.

Most of the questions aren't that difficult, like "What is the name of the President of the United States now?"

Also an easy one? "Name one state that borders Mexico." Just one. There are four states to choose from.

But even if you paid attention in eighth-grade US-history class, some of these might trip you up. Others will surprise you. Here's a few of the questions with their answers after each picture.

Remember, you need six correct answers to pass: