Discussion :: Odd Man Out and Series
- Find out the wrong number in the series, and taking this wrong number as the first term of the second series formed, following the same logic, find out the fourth term of the second series. 6, 8, 10, 42, 146, 770, 4578
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Answer : Option D
Explanation :
The given series is based on the following pattern:
6 * 1 + 1 * 2 = 8
8 * 2 - 2 * 3 = 10
10 * 3 + 3 * 4 = 42
42 * 4 - 4 * 5 = 148
148 * 5 + 5 * 6 = 770
770 * 6 - 6 * 7 = 4578
Starting with the wrong number 146, we get
The second number = 146 * 1 + 1 * 2 = 148
The third number = 148 * 2 - 2 * 3 = 290
The fourth number = 290 * 3 + 3 * 4 = 882.
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