Desafíos matemáticos

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

¿Qué significa jugar limpio? Cumplir las reglas, ayudar a los demás y respetar los turnos son algunos ejemplos. Este libro se combina con el título de ficción Tu turno. What does it mean to play fair? Following rules, helping others, and taking turns are a few ways to do it. This Spanish book pairs with the fiction title Tu turno.

The unsinkable luxury liner known as the Titanic may have sunk on its first transatlantic voyage in 1912, but people remain riveted to its storied legend. The collision with the iceberg in the North Atlantic was not the only mistake that was made that day. In this spellbinding volume, readers will learn about the passengers and crew aboard the doomed ship and what really happened that tragic night. Historical photographs will transport them back to the glamorous era, while the narrative paints an absorbing picture of the Titanic's sad fate.

This extraordinary book shows in a simple way how the Sun's light and warmth affect Earth. Children will be amazed to learn that the Sun is actually a star, and that its position and distance from Earth cause day and night as well as changing weather and the seasons. Simple, brief explanations also describe Earth's rotation and tilt, Earth's two poles and the equator, a solar eclipse, how plants make food from sunlight, and how sunlight colors our world.

Ideal for introducing children to great works of literature, this reference helps parents and educators delve into Gabriel Garc�a Marquez's classic books with their young readers. Ideal para introducir a los ni�os a las obras grandes de la literatura, esta referencia ayuda a los padres y a los educadores a rebuscar en los libros cl�sicos de Gabriel Garc�a M�rquez con sus j�venes lectores.