子非鱼的博客

摘要：It is well known that if the square root of a natural number is not an integer, then it is irrational. The decimal expansion of such square roots ... 阅读全文

摘要：It is possible to write five as a sum in exactly six different ways:4 + 13 + 23 + 1 + 12 + 2 + 12 + 1 + 1 + 11 + 1 + 1 + 1 + 1How many different w... 阅读全文

摘要：It turns out that 12 cm is the smallest length of wire that can be bent to form an integer sided right angle triangle in exactly one way, but ther... 阅读全文