555

Could you tell me what you want with "555"? Here are a few quick options, since this is exam prep:

• Quick facts about the number: 555 = 3 × 5 × 37; Roman numeral DLV; divisible by 15; binary 1000101011₂.
• Quick practice problem ideas: factorize 555; compute 555 in a different base; solve a short modular arithmetic or divisibility problem involving 555.
• If you’re after Thai slang: 555 stands for laughter (because 5 = "ha" in Thai).

Tell me which you’d like, or share a specific task, and I’ll help you solve it.