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A biography of the geometer Donald Coxeter.
What is the sum of the reciprocals of the triangular numbers?
My age is a number consisting of two digits, 1/2 of this number is a mean proportional between these two digits, and two years hence, my age will be a third proportional to the same two digits, directly as they stand in my present age.
After completing this assignment on Simon Stevin's treatment of decimal fractions in his 1585 De Thiende, the author's preservice mathematics teachers understood why our usual procedure for multiplying such fractions works.
There is a lion in a well whose depth is 50 palms. He climbs and slips back a certain amount each day. In how many days will he get out of the well?
The Ohio Section Short Course will consider the use of original sources in teaching mathematics.
One says that 10 garments were purchased by two men at a price of 72 dirhams. The garments varied in value. The price of each garment of one man is 3 dirhams more than the price for each garment of the other. How many garments did each man buy?
A wooden beam is stood vertically against a wall. The length of the beam is 30 units.
A leech invited a slug for a lunch a leuca away.
Given a door and a measuring rod of unknown dimensions, the rod is used to measure the door.