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Now there are six-headed four legged animals and four-headed two-legged birds. Find the total number of animals and birds.
A ladder has 100 steps. On the first step sits 1 pigeon; on the second, 2; on the third, 3; and so on up to the hundredth. How many pigeons in all?
This is the title page of the 1640 printing of Galileo's Operation of the Geometrical and Military Compass, originally published privately in 1606. Galileo had invented a version of this geometrical compass a few years earlier and evidently gave copies of this manual to those who bought the compass. The compass had many uses, from performing square root calculations to determining ranges of cannons to solving surveying problems.
Relationships between Architecture and Mathematics
The third part of a necklace of pearls, broken in a lover's quarrel, fell to the ground...
An oblong garden is a half yard longer than it is wide and consists entirely of a gravel walk...
A speculator bought stock at 25% below par and sold it at 20% above par. He gained $1560. How much did he invest?
In a given square, inscribe 4 equal circles so that...
Find the isoceles triangle of smallest area that circumscribes a circle of radius 1.