I had some questions and small discoveries.

  • M5

    1. I thought the trick is properly for any mod that among 1 through 9.
      ?? Is that right
    2. When the number is smaller than the mod number, the remainder also can be negative numbers too.
  • ADMIN M0★ M1 M5

    @sincereseagull This is a great observation! 🙂 There definitely exist negative remainders, and they are incredibly useful when we want to find the remainder of a product of numbers that are multiplied together. Prof. Loh covers negative remainders in Day 1 Challenge Part 7, Day 1 Your Turn Part 2, Day 3 Your Turn Part 3, and Day 4 Challenge Part 4. 🎉