Math Is Fun Forum

How's it going everyone? I'm a 24 year old from Texas, and have always had a love of numbers.  I don't necessarily have amazing knowledge of calculus, trig, and such, but I make due with a great imagination and a desire to do things with numbers and math that stimulate the mind and pique the interest.   
PS- I especially enjoy ciphers and encryption, so I might be randomly throwing out challenges based on an encryption program I'm writing.