555

Not sure what you want with 555. Here are a few quick math facts and options. Tell me which you’d like, or I can make you some practice problems.

Quick facts about 555:

• Decimal: 555
• Prime factorization: 3 × 5 × 37
• Divisible by: 3 and 5 (and thus by 15); not by 9
• Hexadecimal: 0x22B
• Binary: 1000101011₂
• Octal: 1053₈
• Base-7: 1422₇
• 555 = 5 × 111 = 5 × 3 × 37
• Number of divisors: 8 (1, 3, 5, 15, 37, 111, 185, 555)

If you want, I can generate a few exam-style questions (and solutions) using 555. For example:

• Find all divisors of 555.
• Prove 555 is not divisible by 9.
• Convert 555 from decimal to hex and to base 7.
• Compute gcd(555, 1000) and lcm(555, 1000).