6,16,11,31,18.5,52.5,29.75 Find the wrong number in this series? Please tell me logic.
Answers
Given : 6,16,11,31,18.5,52.5,29.75
To Find : the wrong number in this series
Solution:
6,16,11,31,18.5,52.5,29.75
Break it into two series
6 11 18.5 29.75
16 31 52.5
6 * 1.5 + 2 = 11
11 * 1.5 + 2 = 18.5
18.5 * 1.5 + 2 = 29.75
second series is dependent upon 1st series
6 * 3 - 2 = 16
11 * 3 - 2 = 31
18.5 * 3 - 2 = 53.5
Hence 52.5 is wrong in the series as it should be 53.5
or second series can be defined like
16 * 1.5 + 7 = 31
31 * 1.5 + 7 = 53.5
Hence 52.5 is wrong in the series as it should be 53.5
or series can be defined as
6 * 3 - 2 = 16
16 * 0.5 + 3 = 11
11 * 3 - 2 = 31
31 *0.5 + 3 = 18.5
18.5 * 3 - 2 = 53.5
53.5 * 0.5 + 3 = 29.75
Hence 52.5 is wrong in the series as it should be 53.5
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