Project Euler

Whenever I learn a new programming language, I found the best way was to launch myself in the deep end and answer Project Euler puzzles. These are mathematical problems that can be solved with programming. Bear in mind these are my personal answers, so be warned there will be spoilers. Here is my collection of solutions:

Problem 1 Multiples of 3 and 5

Problem 2 Even Fibonacci numbers

Problem 3 Largest prime factor

Problem 4 Largest palindrome product

Problem 5 Smallest multiple

Problem 6 Sum square difference

Problem 7 10001st prime

Problem 8 Largest product in a series

Problem 9 Special Pythagorean triplet

Problem 10 Summation of primes

Problem 11 Largest product in a grid

Problem 12 Highly divisible triangular number

Problem 13 Large sum

Problem 14 Longest Collatz sequence

Problem 15 Lattice paths

Problem 16 Power digit sum

17

Problem 17 Number letter counts

18

Problem 18 Maximum path sum I

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Problem 19 Counting Sundays

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Problem 20 Factorial digit sum

21

Problem 21 Amicable numbers

22

Problem 22 Names scores

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Problem 23 Non-abundant sums

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Problem 24 Lexicographic permutations