By Simpliflication =`((x-1)(x-2))/((x-2)(x-3))-:((x-1)(x-4))/((x-3)(x-4))` ` =`((x-1))/((x-2))-:((x-1))/((x-3)) = 1`
14 36 80 168 ? 696
Complete the series choosing the missing number.
110, 99, 86, ___, 54, 35.
47, 72, 122, ?, 297, 422
150, 158, 131, 195, 70, ?
324 972 486 1458 729 ?
...140, 146, 158, 176, ?, 230
45, 166, 607, 1568, 3249, ?
1000 100 20 ? 2.4 1.2
289 169 121 ? 25 9
...415 246 367 ? 335 310
...
