World history, 11th grade 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 pieces22x17 - 374 pieces24x18 - 432 pieces25x19 - 475 pieces26x20 - 520 pieces28x21 - 588 pieces29x22 - 638 pieces30x23 - 690 pieces Start a new game Create a multiplayer game table

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