A man bought a number of sheep for $225; 10 of them having died, he sold 4/5 of the remainder for the same cost and received $150 for them. How many did he buy?

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The radius of a circle is 3.20 meters. Compute to within .001m the areas of the inscribed and circumscribed equilateral triangles.

Two travelers, starting at the same time from the same point, travel in opposite directions round a circular railway.

What is the value of X...

It is required to determine whether 30 horses can be put into 7 stalls; so that in every stall there may be, either a single horse, or an odd number of horses.

A description of a Research Experience for Undergraduates conducted in 2007 at Hood College.

A translation from the original Greek of a manuscript on magic squares by the Byzantine scholar Manuel Moschopoulos, written about 1315

Show that the curves x2 - y2 = a2 and 2 xy = b2 cross at right angles.

A cat sitting on a wall 4 cubits high saw a rat prowling 8 cubits from the foot of the wall;

A study of Victorian idealism and its relation to religion, as exemplified in the work of three 19th century British mathematicians.