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Number Series 2-2

970, 84.5, 113.5, 157, 215, ?
A287
B287.5
C288
D285


1017, 18, 22, 49, 65, ?
A190
B185
C182
D285


11 217, 213, 205, 189, 157 ?
A88
B96
C93
D95


1231, 62, 186, 744, 3720 ?
A23320
B23340
C22320
D22330


135, 7, 10, 36, ?, 690
A134
B136
C128
D132


1415, 32, 93, 460, ?, 35354
A3213
B3223
C3215
D3315


154, 6, 12, 30, 90, 315, ?
A1240
B1260
C1254
D1265


167, 30, 49, 66, 79, 90, 97, ?
A103
B104
C102
D100