Set 1 · Binary to Decimal 0 of 10 solved
Reading base 2
For each binary number, calculate its decimal value. Use the place value table. A binary 1 means “include this place value”; a binary 0 means “skip it.” Add up the included values.
Reminder. Read binary right to left. The rightmost bit is always the smallest place value (1).
| Position | Bit 8 | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 |
|---|---|---|---|---|---|---|---|---|
| Place value | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
Set 2 · Binary to Hex 0 of 8 solved
Compressing binary into base 16
Split each byte into two nibbles (4 bits each). Convert each nibble using the reference table. The upper nibble is the first hex digit; the lower nibble is the second. Type your answer as 0x followed by two hex digits, or just the two digits. Either form is accepted.
| Binary | Decimal | Hex | Binary | Decimal | Hex |
|---|---|---|---|---|---|
| 0000 | 0 | 0 | 1000 | 8 | 8 |
| 0001 | 1 | 1 | 1001 | 9 | 9 |
| 0010 | 2 | 2 | 1010 | 10 | A |
| 0011 | 3 | 3 | 1011 | 11 | B |
| 0100 | 4 | 4 | 1100 | 12 | C |
| 0101 | 5 | 5 | 1101 | 13 | D |
| 0110 | 6 | 6 | 1110 | 14 | E |
| 0111 | 7 | 7 | 1111 | 15 | F |
Forensic note: A file that begins with FF D8 FF is a JPEG, regardless of what the filename says. Recognizing hex signatures is a real forensic skill.
Set 3 · Hex to ASCII 0 of 2 solved
Bytes become letters
Each hex pair below is one ASCII character. Use the reference to convert each pair into a letter, then type the full decoded word into the answer box. Capitalization does not matter.
Binary → Hex → ASCII chain
Convert each binary byte to its hex value, then look up the ASCII letter. The five letters form a word you have heard a lot today.