555

Not sure what you want with just "555". Here are a few quick math notes and a tiny practice set you can use for exam prep. If you want something else (a different subject, or a longer set), tell me.

Quick facts about 555

• Prime factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555
• It’s divisible by 3, 5, and 15
• In binary: 555 = 1000101011₂
• In base 7: 555₁₀ = 1422₇ (since 1×343 + 4×49 + 2×7 + 2 = 555)

Mini practice (useful for quick checks)

1. gcd(555, 420) = ?
2. Write 555 as a product of prime factors (you already have 3 × 5 × 37).
3. Convert 555 to base 9 (what is 555 in base 9?).
4. If x ≡ 555 (mod 1000), what is x mod 1000? ( trivial, but good to confirm modular thinking)

If you tell me your subject area (algebra, number theory, calculus, statistics, etc.) or the specific exam you’re studying for, I can tailor a longer set of problems or explain concepts in that area.