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A cultural history of the infinite, from ancient to modern times, in which the author clarifies the conceptual underpinnings of this vast topic.
Three people buy wood together. One pays the merchant 5 coins, another 3 coins, and the last 2 coins.
This website contains a complete version of Euclid's Elements, with all the proofs.
If you are h feet tall and walk all the way around the Earth, keeping to the same circumference, how much farther has your head gone than your feet when you complete the journey?

Here are all articles, classroom activities, and reviews arranged into annual volumes starting with 2004.

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A water tub holds 73 gallons; the pipe which fills it usually admits 7 gallons in 5 minutes; and the tap discharges 20 gallons in 17 minutes.
What is the perpendicular height of a cloud when it's angles of elevation were 35 degrees and 64 degrees as taken by two observers?

An introduction to the prime numbers in many of their aspects.

Determine the radii of three equal circles decribed within and tangent to a given circle, and also tangent to each other