What is the quotient of 2/5 divided by 1/10?

This English king was executed during the English Civil War in the year 1649.

This culture was the first to use negative numbers.

It's the tallest grass in the world.

On what continent will you find the Atlas Mountains?

What is a regular polygon with eight sides called?

Who invented the first electro-chemical battery?

The old medical practice that involved drilling holes into the skull to relieve pressure was known as:

In humans, it's the rarest blood type.

This planet is closest to the sun.