Problem 1/Challenge #1: Multiples of 3 and 5
Problem 2/Challenge #2: Even Fibonacci numbers
Problem 3/Challenge #3: Largest prime factor
Problem 4/Challenge #4: Largest palindrome product
Problem 5/Challenge #5: Smallest multiple
Problem 6/Challenge #6: Sum square difference
Problem 7/Challenge #7: 10001st prime
Problem 8/Challenge #8: Largest product in a series
Problem 9/Challenge #9: Special Pythagorean triplet
Problem 10/Challenge #10: Summation of primes
Problem 11/Challenge #11: Largest product in a grid
Problem 92/Challenge #92: Largest prime factor