- Problem 3: Largest prime factor
- Problem 5: Smallest multiple
- Problem 7: 10001st prime
- Problem 10: Summation of primes
- Problem 14: Longest Collatz sequence
- Problem 15: Lattice paths
- Problem 24: Lexicographic permutations
- Problem 34: Digit factorials
- Problem 53: Combinatoric selections
- Problem 85: Counting rectangles
- Problem 31: Coin sums
- Problem 81: Path sum: two ways
- Problem 76: Counting summations
- Problem 114: Counting block combinations I
- Problem 169: Expressing numbers as sums of powers of 2
- Problem 22: Names scores
- Problem 54: Poker hands
- Problem 67: Maximum path sum II
- Problem 79: Passcode derivation
- Problem 104: Pandigital Fibonacci ends
- Problem 83: Path sum: four ways
- Problem 107: Minimal network
- Problem 119: Digit power sum
- Problem 186: Connectedness of a network
- Problem 203: Squarefree Binomial Coefficients
- Problem 39: Integer right triangles
- Problem 57: Square root convergents
- Problem 66: Diophantine equation
- Problem 92: Square digit chains
- Problem 197: Investigation of iterated functions
- Problem 11: Largest product in a grid
- Problem 18: Maximum path sum I
- Problem 48: Self powers
- Problem 82: Path sum: three ways
- Problem 107: Minimal network
- Problem 84: Monopoly odds
- Problem 205: Dice Game
- Problem 121: Disc game prize fund
- Problem 493: Under The Rainbow
- Problem 207: Integer partition equations