- Long Division/Multiplication
  00128 Software CRC			Calculate the CRC value for a string of text(divide)
  00550 Multiplcation by Rotation	Find shortest factor with rotamult-property
  00465 Overflow			Determine whether numbers overflow an int

- Fractions 
  00202 Repeating Decimals		Figure out length of repeat period of fraction
  00834 Continued Fractions		Convert fraction to a continued fraction
  00275 Expanding Fractions

- Polynomials
  00126 The Errant Physicist		Multiply polynomials of x and y
  00586 Instant Complexity		Calculate the complexity of a program

- Primes/Factorization
  00136 Ugly Numbers			Find the 1500th ugly number factors(2,3,5)
  00583 Prime Factors			List the prime factorization of a number efficiently
  10311 Goldbach and Euler		Determine if a number is sum of 2 primes

- Sorting:
  00110 Meta-Loopless Sorts		Produce Pascal programs that do sorting
  00120 Stacks of Flapjacks		Sort a stack of flapjacks using flips
  00514 Rails				Sort a train using a station
  00538 Balancing Bank Accounts		Figure out who owes who what	
  00612 DNA Sorting			Sort some DNA based on some trait
  00632 Compression (II)		Perform a Burrows Wheel Transform

- Invariant
  00264 Count on Cantor			Find offsets


- Additive/Multiplicative Series
  00107 The Cat in the Hat		Calculate the number of cats in the hat	
  00138 Street Numbers			Find special house numbers
  10302 Summation of Polynomials	Find the sum of the first N cubes

- Exponentiation/Logarithms
  00113	Power of Cryptography		Find integer roots of large numbers
  00545 Heads				Find 2^-n = x.xxxE-y for large n