4×4 Medium Mathdoku 4×4 Mathdoku Puzzles 4×4 Medium 10 puzzles available 🧩 4×4 Medium #1 B → 🧩 4×4 Medium #2 B → 🧩 4×4 Medium #3 B → 🧩 4×4 Medium #4 B → 🧩 4×4 Medium #5 B → 🧩 4×4 Medium #6 B → 🧩 4×4 Medium #7 B → 🧩 4×4 Medium #8 B → 🧩 4×4 Medium #9 B → 🧩 4×4 Medium #10 B →