Which property is this? online puzzle

5x4 - 20 pieces6x5 - 30 pieces8x6 - 48 pieces9x7 - 63 pieces10x8 - 80 pieces12x9 - 108 pieces13x10 - 130 pieces14x11 - 154 pieces16x12 - 192 pieces17x13 - 221 pieces18x14 - 252 pieces20x15 - 300 pieces21x16 - 336 pieces23x17 - 391 pieces24x18 - 432 pieces25x19 - 475 pieces27x20 - 540 pieces28x21 - 588 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.

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