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The sequence is: 9, 3, 6, 6, 3, 9, 5, 9, 3, 7, 8, 9, 1, 6, 3, 9, 6, 3, 9 We need to count the 3's that are neither preceded by 6 nor immediately followed by 9. The occurrences of 3 in the sequence are at positions: • 1st position: Preceded by 9 (not counted). • 3rd position: Preceded by 6 (not counted). • 5th position: Preceded by 6, followed by 9 (not counted). • 9th position: Preceded by 9, followed by 7 (counted). • 13th position: Preceded by 1, followed by 6 (counted). Thus, there are two 3's that meet the condition. Therefore, the correct answer is (c), Two.
15, 30, 30, 20, 10, 8
Find the wrong number in given number series.
6490, 6377, 6294, 6211, 6138
1600, 1604, 1544, 1760, 1248, 2248, 520
12, 18, 40, 90, 270, 945
8 12 21 36 62 98
231, 241, 233, 239, 235, 243
Find the wrong number in the given number series.
78, 103, 152, 233, 356, 523
131, 212, 261, 286, 295, 299
224, 183, 144,115, 86, 63, 44.