555

Not sure what you need with “555.” Here are a few quick options. Pick one or tell me your topic and I’ll tailor problems.

• Quick math facts: 555 = 3 × 5 × 37; divisors: 1, 3, 5, 15, 37, 111, 185, 555.
• Base conversions: binary 1000101011, hex 0x22B, Roman numerals DLV.
• Time/units: 555 seconds = 9 minutes 15 seconds.
• Practice problems (I can generate): factorization, divisibility tests, modular arithmetic, etc.

If you meant something else (like “555” as laughter), just let me know.