The crisp new dollar bill that I have just taken from my wallet bears the serial number 24598176. It’s easy to tell that the number is exactly divisible by 2 but not by 5. Is it divisible by 3? by 4?
Amazon S3 on MSN
Divisibility rules for quick mental calculations
Your guides to the weird side of the web list divisibility rules for quick mental calculations.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results