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10, 26, 74, 218, 654, 1946, 5834

Correct Answer: 654

Explanation:

2nd term = (1st term) x 3 - 4 = 10 x 3 - 4 = 26.


3rd term = (2nd term) x 3 - 4 = 26 x 3 - 4 = 74.


4th term = (3th term) x 3 - 4 = 74 x 3 - 4 = 218.


5th term = (4th term) x 3 - 4 = 218 x 3 - 4 = 650.


∴ 5th term must be 650 instead of 654.


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