Binary number systems

These are binary codes for 4 letters in English alphabet. In case you don't have an alphabet-binary codes chart to look at, you can convert these binary numbers to decimal, then enter manually with your keyboard, the letters will be typed out.

(01000011)BIN = 2^6 + 2^1 + 2^0 = 67
(01001111)BIN = 2^6 + 2^3 + 2^2 + 2^1 + 2^0 = 79
(01000100)BIN = 2^6 + 2^2 = 68
(01000101)BIN = 2^6 + 2^2 + 2^0 = 69

Now hold down Alt-key and key in: Alt 67, Alt 79, Alt 68, Alt 69
The secret is discovered!

The decoded form is

01000011- C
01001111- O
01000100- D
01000101- E

Other alphabet-binary codes can be found in the link in the source area.
Hope it helps!!!

Binary can be easily converted into octal and hexadecimal. Just take the numbers in groups of three or four respectively. It looks like you want it described in hexadecimal. First a short lesson on "hex" numbers:

0 = 0
1 = 1
2 = 2
.
.
.
9 = 9
A = 10
B = 11
C = 12
D = 13
E = 14
F = 15

So, taking these binary sequences and converting them to hex:

43 4F 44 45

The way to do this is just take each four binary digit group:

0000 = 0
0001 = 1
0010 = 2
0011 = 3
0100 = 4
0101 = 5
0110 = 6
0111 = 7
1000 = 8
1001 = 9
1010 = 10
1011 = 11
1100 = 12
1101 = 13
1110 = 14
1111 = 15

You can also look at how these are calculated:

Each position in binary is treated the same as decimal (or octal or hex, for that matter). You simply raise the "base" number to the power of that position:

1011 in binary is like saying:
1 * 2³ + 1 * 2² + 0 * 2^1 + 1 * 2^0
= 1 * 8 + 1 * 4 + 0 * 2 + 1 * 1
= 8 + 4 + 1
= 13 decimal

Hex is determined in much the same way:

45A1 in hex is the same as:

4 * 16³ + 5 * 16² + 10 * 16 + 1 * 1
= 16384 + 2560 + 160 + 1
= 19105 decimal

I hope this helps.