Various scales and charts have been developed to measure everything from the pungency of peppers to the intensity of earthquakes. Test your knowledge of some of them with these multiple choice questions...

History is illuminated by the amazing discoveries of science! Test your knowledge of some of our most famous scientists with these multiple choice questions.

Mathematics is fundamental to our understanding of the world around us. Test your knowledge of this fascinating subject with these multiple choice questions.

Undoubtedly one of our greatest inventions, the personal computer has played an increasingly important role since invading our lives in the early 1980s. See how much you know about these iconic machines with these multiple choice questions...