quiz with a difference

Saw this recently in a physics education journal (IOP Classroom Physics).
I’m probably the last person to have come across this, but still . . .

When giving a quiz why not give the answers and have the troops figure out the questions?
It gets them thinking, as opposed to simply vomiting back up the facts they learned off the night before.
Here are some sample questions / answers for junior cert magnetism:

1. Iron, cobalt and nickel
Which elements are magnetic?

2. They repel each other
What do two north poles or two south poles do when they are near each other?
3. It lines up with the magnetic field
What does a magnetic compass do?

4. A region of space where a magnetic material experiences a force
What is a magnetic field?

5. Increasing the number of coils on an iron core
How could you increase the strength of an electromagnet?

6. Away from the north pole and towards the south pole
Which way does a compass needle point when near a magnet?

7. You end up with two smaller magnets
What happens when you break a magnet in half?

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