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A Method of Defining Coefficients in the Equations of Chemical Reactions

A simple method of defining the coefficients in the equations of chemical reactions with the help of a system of linear algebraic equations.

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Tournament Scheduling

Scheduling games is a little more challenging than one might desire. Here are some tournament formats that sport schedulers use.

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Far Horizon

An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?

Carbon Footprints

Stage: 4 Challenge Level: Challenge Level:1

Clearly, this problem is rather involved and designed to get you thinking.

The only hint is that you ask questions and then try to locate the data to answer them!