Pandigitals with prime-divisible substrings
Walkthrough of Project Euler problem #43
Multiple permutations
Walkthrough of Project Euler problem #32
Circular primes
Walkthrough of Project Euler problem #35
Fractions of a decimal fraction
Walkthrough of Project Euler problem #40
Yet another naive BigInteger solution
Walkthrough of Project Euler problem #29
Factorials of digits
Walkthrough of Project Euler problem #34
Powers of digits
Walkthrough of Project Euler problem #30
Bases and palindromes
Walkthrough of Project Euler problem #36
Spiral square diagonals
Walkthrough of Project Euler problem #28
The last digits of large numbers
Walkthrough of Project Euler problem #48
Repeating decimals
Walkthrough of Project Euler problem #26
BigInteger laziness
Walkthrough of Project Euler problem #25