5 ms·

But isn't every number the sum of two primes?

• jacques_chester 14y ago
  > buying multiples Plus there's stuff like using off-by-one values for fractional exchange. Eg 79 points for 99c, or vice versa. If you step to 80p / dollar it's easy to calculate a sufficiently-good approximation mentally, but lots of people aren't used to mental shortcuts like that.