555

Not sure what you need with "555." Do you want a quick drill, or help with a topic for an exam? Here are you can pick from:

• Quick number-theory warm-up using 555 (factorization, bases, properties)
• Factorization and divisors of 555
• Converting 555 to other bases (binary, hex, etc.)
• A short 15-minute cram session on a subject you’re studying (calculus, stats, linear algebra, CS, etc.)
• A 5-question mini-quiz with answers to practice

If you’d like, I can start right away with a 5-question mini-quiz about 555. What subject and level are you studying, and what would you prefer?