# Convergence articles

Displaying 131 - 140 of 655

This is a page from an early printed edition of the Arithmetica of Jordanus de Nemore (early 13th century).
A reprint of the 32nd yearbook of the NCTM, dealing with developments in mathematics education in the U.S. and Canada. In particular, it gives a history of the various reform movements up to the publication date of 1980.
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?
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...
A dramatization, in two Acts, of the struggles of European mathematicians of the seventeenth and eighteenth centuries to come to terms with the newly admitted negative numbers.
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.
Of the two water reeds, the one grows 3 feet and the other 1 foot on the first day. The growth of the first becomes every day half of that of the preceding day, while the other grows twice as much as on the day before.
Show that the curves x2 - y2 = a2 and 2 xy = b2 cross at right angles.