3600 600 120 30 ? 5
...2401 2402 1203 ? 105 26
...261Â Â Â Â Â 256Â Â Â Â Â Â 246Â Â Â Â Â Â 231Â Â Â Â Â 211Â Â Â Â Â ?
...73920, 9240, ?, 220, 44, 11
12, 23, 68, 271, 1354, ?
16 23 31 40 50 61 ?
...Which of the following numbers will replace the question mark (?) in the given series?
69, 70, 74, 83, ?, 124
7    7       14    42   ?     840
...51     53     109     332     ?     6686
...0.5 1.5 5 ? 76 385
...