For the benefit of the uninitiated we might say that

“stretcher” = length of brick x depth

“header” = breadth "

“closure” = half-breadth "

213. A woman has a basket of 150 eggs; for every 1½ goose egg she

has 2½ duck eggs and 3½ hen eggs. How many of each had she?

The Great Chess Problem.

The puzzle king · 第 173 / 216 题