Ravi came across a mathematical series which is given below, later he found that one of the number in the given sequence is wrong. Can you mark the incorrect number in the series?
2, 8, 12, 20, 30, 42, 56
A
8
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B
42
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C
30
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D
20
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E
12
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Solution
The correct option is A 8 Ravi calculated the difference between two consecutive numbers and observed a pattern something like:
Therefore, he concluded that 8 is written in place of 6.