摘要:
Description Hogwarts is under attack by the Dark Lord, He-Who-Must-Not-Be-Named. To protect the students, Harry Potter must cast protective spells so 阅读全文
摘要:
Description The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15 slidin 阅读全文
摘要:
Description Mad scientist Mike has just finished constructing a new device to search for extraterrestrial intelligence! He was in such a hurry to laun 阅读全文
摘要:
Description Mad scientist Mike is building a time machine in his spare time. To finish the work, he needs a resistor with a certain resistance value. 阅读全文
摘要:
Description Mad scientist Mike is busy carrying out experiments in chemistry. Today he will attempt to join three atoms into one molecule. A molecule 阅读全文
摘要:
Description Mad scientist Mike entertains himself by arranging rows of dominoes. He doesn't need dominoes, though: he uses rectangular magnets instead 阅读全文