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Convergence articles

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If 40 oranges are worth 60 apples, and 75 apples are worth 7 dozen peaches, and 100 peaches are worth 1 box of grapes and three boxes of grapes are worth 40 pounds of pecans, how many peaches can be bought for 100 oranges?
A horse halving its speed every day runs 700 miles in 7 days.
Three equal circumferences with radii 6" are tangent to each other. Compute the area enclosed between them.
Given two circles tangent to each other and to a common line, determine a relationship between the radii and the distance between the tangent points.
Images from a 16th century text about the astrolabe and its uses
What is the sum of the reciprocals of the triangular numbers?
A new sourcebook containing the works in their original form along with a translation and a brief commentary.
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.
A collection of articles dealing with mathematical models and objects and how they can be used in teaching.
A merchant woman buys and sells apples and pears for Denaros. How much did she invest in apples; how much in pears?