The correct answer is C
23, 27, 39, 59, ?, 123
24, 42, 60, ?, 96, 114
10, ?, 50, 100, 250, 500
11 6 7 12 26 ? 205.5
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, ?
12, 19, 32, ?, 76, 107
138, 140, 152, 174, ?, 248
160, 166, 178, 196, ?, 250
?, 15, 45, 225, 1575, 14175
8 8 12 24 60 ?
