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Math Quiz

Are you ready to have your math skills put through their paces? This entertaining and completely free quiz will put your arithmetic prowess to the test! The questions start off easy but get increasingly more challenging toward the end. Curious to see how well you score? Let's find out.

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Fact Lab

When certain kinds of fish disappear, scientists look to geologists to explain why. The geologist will look to activity in the ocean to find the reason. Geologists use much of the same tools as archaeologists to collect samples in their field of study.

The smallest sample that can be clearly observed under a light microscope is a 500 nanometer long object. It is possible to observe smaller objects than this, but their features might be distorted. Anything smaller than 500 nanometers loses detail because of the wave nature of light.

Dividing by zero is not only impossible but also dangerous! In 1997, when a crewman aboard the USS Yorktown mistakenly entered a zero into the ship’s computer, it tried to divide by null, incapacitating the mighty vessel and leaving it stranded for several hours.

Fact Lab