title: hexadecimal converting back into decimal
body: <p>My book says the hexadecimal notation FFFF equals 65535 in decimal value. As I understand it that equals to 2^16.  There are a couple of things I still don't fully understand. 1) Is FFFF a mix of both hexadecimal and decimal notation? How does FFFF equals 2^16? I don't understand how to interpret FFFF.<br/><br/> The right most F represents 8 4 2 1, the second most F represents 128 64 32 16, the third most F represents 2048 1024 512 256 the the left most F represents 32768 16834 8192 4096? Is that the correct way of thinking about FFFF? I'm not sure how FFFF equals 65535. I'm sorta lost I don't understand why FFFF equals 65535. Am i thinking about it correctly or am I way off? </p>