Bernardo Recaman 
Bogota Puzzles [EPUB ebook] 

Calculate the number of a neighbor's grandchildren based on their ages, figure out the denominations of a government's postage stamps, swap the positions of two chess pieces in the least number of moves, and solve other intriguing puzzles with this captivating compendium. Inspired by such illustrious collections as the The Canterbury Puzzles, The Moscow Puzzles, and The Tokyo Puzzles, Colombian mathematician and professor Bernardo Recamán assembled these 80 brainteasers, which he acquired while living and working in Bogotá. Recamán's colleagues, students, friends, and acquaintances contributed to this stimulating potpourri of word problems, sudoku-style challenges, and other math-based diversions. Complete solutions appear at the end.