555

Would you like quick facts about 555, or exam-style practice problems involving it? Here are a few quick facts to start:

• Prime factorization: 555 = 3 × 5 × 37
• Sum of digits: 5 + 5 + 5 = 15; Product of digits: 5 × 5 × 5 = 125
• Roman numeral: 555 = DLV
• Binary: 555 in binary is 1000101011
• Hex: 555 decimal = 0x22B
• In base 7: 555 = 1422_7; in base 5: 555 = 4210_5

If you want exam-style problems, here are a few quick ones (and I can tailor to your topic):

• gcd and lcm: gcd(555, 450) = ?, lcm(555, 300) = ?
• Base conversions: convert 555 from decimal to base 7 and base 5 (answers above: 1422_7 and 4210_5)
• Factorization-based: verify 555 = 3 × 5 × 37
• Modulo: 555 mod 9 = ?
• Simple algebra: if a + b + c = 555 and a = b = c, what is a?

Tell me your subject area (number theory, algebra, computing, etc.), and I can generate a focused 5–10 question mini-quiz.