3 ms·

I guess it sounds impossible... 10x 10 digit numbers... maybe ??

• Olreich 6y ago
  Memorizing ten phone numbers isn’t hard, and those are perfect size! Give these fake phone numbers to 10 fake friends starting with A through J and you’re golden.
• slavik81 6y ago
  I sat there typing it into my calculator until I built up muscle memory. It's not that much compared to a song, a play or a dance routine.