>>20892358>>20895974>special mathAmerica's started all that common core bullshit. Their Advanced Mathmatics is like everywhere else's Special Needs Math of two grade levels lower, you can't blame him for not understanding basic concepts.
With 9 digits, using numbers alone, you'd have every number from 000,000,000 to 999,999,999. That is exactly one billion possible codes. Add in the 26 letters, and that number soars up to around 1.02x10^14. In case you don't understand scientific notation, that's over 100 trillion possible combinations.
