A single term in the sequence below does not conform to the established mathematical rule. Identify the incorrect number.
4, 12, 30, 68, 148, 304, 622
Correct Answer :
148
Solution :
The correct answer is 148.
To identify the incorrect term in the sequence, let us analyze the mathematical rule governing the progression between consecutive terms:
4, 12, 30, 68, 148, 304, 622
We observe that each term is obtained by multiplying the previous term by 2 and adding consecutive even integers starting from 4:
According to this rule, the term following 68 should be 146 rather than 148.
Therefore, 148 is the incorrect number in the sequence.
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