555

Not sure what you want with 555. Do you want help with math, bases, Roman numerals, or something about electronics (555 timer)? Here are a few quick facts you can use in exams:

• Prime factorization: 555 = 3 × 5 × 37
• Divisible by: 3 and 5 (but not by 9 or 2)
• Digit sum: 5+5+5 = 15

Base conversions (decimal 555):

• Binary: 1000101011_2
• Octal: 1053_8
• Hex: 0x22B
• Base 6: 2323_6
• Base 7: 1422_7
• Base 5: 4210_5
• Roman numerals: DLV

If you’d like, I can turn this into a quick 5-question practice set or focus on a specific area (e.g., more base conversions, or a short 555 timer overview for electronics). Which would you prefer?