Numeroman: http://ideone.com/eV1mQo

Human Time: http://ideone.com/BFAR7j

Happy Numbers: http://ideone.com/pa5Gto

IsPrime calculator: http://ideone.com/qdxZ0e

Prime factorisation calculator: http://ideone.com/nGYziQ

Project Euler LCM: http://ideone.com/e5Xv7M

Swap Function: http://ideone.com/XlRvlv