• M0★ M2★ M3★ M4★ M5

    Module 3 Day 10 Your Turn Part 3

    Ok, I admit I didn't do the only-top-row method like Prof Loh did, but I did a similar method:
    Like him, I discovered that horizontal 1x3's come in 'clusters', meaning that I can see them as one group.
    My casework was based on the # of vertical rectangles:

    • If there're 0 vertical's, then there are 3 'clusters' - 1 way
    • If there's 1 vertical...wait, that's not possible! You can't fit 3's into 8! - 0 ways
      So the number of vertical's must be a multiple of 3...
    • 3 vertical's, 2 clusters - 10 ways
    • 6 vertical's, 1 cluster - 7 ways
    • 9 vertical's, 0 clusters - 1 way

    Total = 19 ways 🙂

  • ADMIN M0★ M1 M5

    @rz923 This is really nice! I've also linked this to the Your Turn Part 3 lesson. 🙂 🎉 🎉