Hello Java

题目描述如下： 145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145. Find the sum of all numbers which are equal to the sum of the factorial of their digits. Note: as 1! = 1 and 2! = 2 are no

题目描述如下： An irrational decimal fraction is created by concatenating the positive integers: 0.12345678910 1 112131415161718192021… It can be seen that the 12th digit of the fractional part is 1.

digit fifth powers

题目描述如下： The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime. There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13, 17,

题目描述如下： The number 3797 has an interesting property. Being prime itself, it is possible to continuously remove digits from left to right, and remain prime at each stage: 3797, 797, 97, and 7. Similar

问题描述如下： If p is the perimeter of a right angle triangle with integral length sides, {a,b,c}, there are exactly three solutions for p = 120. {20,48,52}, {24,45,51}, {30,40,50} For which value of

Distinct primes factors

Problem 48—Self powers