THE author introduces this volume of upwards of 200 pages as “an honest attempt to place the large subject of crop cultivation before the minds of children”; and this is, reasonably enough ...

The library sorting problem is used across computer science for organizing far more than just books. A new solution is less than a page-width away from the theoretical ideal.

arranges them by subject rather than numerically. In the morning, the senior throws a fit: she wants the books equally distributed across the seven shelves. The junior starts by removing a chunk ...