Directions (1-5): What should come in place of the question mark (?) in the following number series?
Q1. 123, 152, 192, 254, 360, ?
(a) 548
(b) 558
(c) 554
(d) 550
(e) None of these
Q2. 7, 9, 17.5, 41, 110.5, ?,1207.25
(a) 341.5
(b) 343.5
(c) 345.5
(d) 338.25
(e) 340
Q3. 31, 51, 80, 134, 237, 421, ?
(a) 728
(b) 724
(c) 722
(d) 726
(e) None of these
Q4. 8000, 3200, 640, ?, 3.2, 0.08,
(a) 62
(b) 64
(c) 66
(d) 65
(e) None of these
Q5. 51, 104, 185, 300, 455, 656, ?
(a) 903
(b) 915
(c) 895
(d) 909
(e) None of these