555

Not sure what you need with just “555.” If you’re prepping for exams, here are a couple quick options:

• Quick math notes on 555:

  • 555 = 3 × 5 × 37
  • It’s divisible by 3 and by 5 (sum of digits is 15; ends in 5)
  • Also 555 = 15 × 37
  • gcd(555, 1000) = 5

• Quick practice you can try (or I can tailor):

  1. Factorize 555 completely.
  2. Compute 555 ÷ 15.
  3. If you split 555 into 5 equal groups, how many in each group?

If you meant something else (a different subject, or a specific problem), tell me the course and topic and I’ll tailor the help.