The correct answer is A
20 60 180 540 ? 4860
18 22 49 ? 190 226
23 48 98 198 ? 798
9 16 56 318 2424 25070
28 34 63 ? 769 3847
7 26 63 126 215 342
112 162 199 ? 242 252
21 23 26 ? 39 51
7, 14, 42, 210, 1470, ?
What will be the next number in the series?
2, 7, 23, 70, ?
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