- Problem 1 - Multiples of 3 or 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
- Probelm 17 - Number letter counts
- Probelm 18 - Maximum path sum I
- Probelm 19 - Counting Sundays