The topic of the lesson online puzzle

5x4 - 20 pieces6x5 - 30 pieces7x6 - 42 pieces9x7 - 63 pieces10x8 - 80 pieces11x9 - 99 pieces13x10 - 130 pieces14x11 - 154 pieces15x12 - 180 pieces17x13 - 221 pieces18x14 - 252 pieces19x15 - 285 pieces21x16 - 336 pieces22x17 - 374 pieces23x18 - 414 pieces25x19 - 475 pieces26x20 - 520 pieces27x21 - 567 pieces29x22 - 638 pieces30x23 - 690 pieces Start a new game Create a multiplayer game table

By arranging these puzzles, you show us that they are worth showing to more visitors. Until they become more popular, they are partially hidden.

20

7