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The logic followed here is: 263, 269, 271, 277, 281, 283 As we can see that all the given numbers are prime numbers. Prime numbers are those which have only two factors i.e., 1 and the number itself. So, the next prime number after 281 is 283. Hence, the correct answer is (C).
2, 4, 12, 20, 30, 42
2.5, 15, 81, 325, 976, 1953
11, 20, 38, 65, 99, 146
2, 12, 36, 80, 150, 252
125, 142, 199, 320, 489, 778
12, 13, 21, 44, 116.5, 340.5
18 45 90 235 450 1125 2250
...96, 480, 120, 360, 150, 750
384, 1152, 144, 432, 56, 162
132, 192, 238, 266, 284, 292