555

Do you want something specific with the number 555, or should I just give you a quick math warm-up involving it? Here are a few quick facts you might find handy:

• 555^2 = 308,025
• 555 = 3 × 5 × 37
• 555 in binary = 1000101011_2
• 555 in hexadecimal = 0x22B
• 555 in Roman numerals = DLV

If you’d like, I can make a 5-question quick quiz (with solutions) on basic arithmetic, number theory, or conversions using 555. Tell me your subject and level (e.g., algebra, calculus, stats).