459.
The GCF is 27.
980 + 875 + 436 + 297 = 2588
-162 + 96.615 + 100 = 34.615
162+64=226
The sum of 162 and 81 is 243.
297
27, 54, 81, 108, 135, 162, 189, 216, 243, 270, 297, . . .
137 plus 149 plus 162 plus 201 plus 217 plus 289 plus 372 = 1,527
162
597
645
27, 54, 81, 108, 135, 162, 189, 216, 243, 270, 297, 324, 351, 378, . . .