555

Not sure what you need with “555.” Do you want math help, or is that Thai slang for laughter?

If you’re prepping for exams, here are quick math facts about 555:

• Prime factorization: 555 = 3 × 5 × 37
• Divisible by: 3, 5, and 15 (but not by 9 or 7)
• Sum of digits: 5+5+5 = 15
• Roman numeral: DLV
• Binary: 1000101011
• Hexadecimal: 0x22B

If you’d like, I can make a short practice set (5–10 questions) on divisibility, prime factorization, and base conversions using 555. Or tell me the exact subject and level (math, CS, etc.), and I’ll tailor it.