Here, S is the introductory sentence. Q is the second sentence, as it is a continuation of S. R follows P, So, P is the third sentence. So, the correct order of the sentences is SQPR.
124, 128, ?, 135, 110, 146
5, 5, 15, 75, ?, 4725
4, 6, 12, 30, ?, 315, 1260
8, 58, 75, 94, 115, ?
161 173 191 215 245 ?
...123, 122, 114, 87, ?, -102
6400, 1600, ?, 80, 16, 4
9 14 38 129 ? 2705 16260
...What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
32, 64, 144, ?, 990, 2970