Programming

Project Euler – Problem 40 Solution

Problem An irrational decimal fraction is created by concatenating the positive integers: 0.123456789101112131415161718192021… It can be seen that the 12th digit of the fractional part is 1. If dn represents the nth digit of the fractional part, find the value of the following expression. d1 x d10 x d100 x d1000 x d10000 x d100000 …

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Project Euler – Problem 36 Solution

Problem The decimal number, 585 = 10010010012 (binary), is palindromic in both bases. Find the sum of all numbers, less than one million, which are palindromic in base 10 and base 2. (Please note that the palindromic number, in either base, may not include leading zeros.) Solution The isPalindromic function here is an enhanced version …

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