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Which of the following options should come in place of the question mark (?) in the given series to make it logically complete? 859, 768, 677, 586, 495,?
388
426
404
462
404
Observe that each term decreases by exactly 91: (859 - 768 = 91), (768 - 677 = 91), and so on.
Observe that each term decreases by exactly 91: (859 - 768 = 91), (768 - 677 = 91), and so on.
Analyze the series
Given the series: 859, 768, 677, 586, 495, ?. We calculate the difference between consecutive terms.
Calculate differences
859 - 768 = 91; 768 - 677 = 91; 677 - 586 = 91; 586 - 495 = 91. The series follows a constant subtraction pattern of 91.
Calculate the next term
Subtract 91 from the last term: 495 - 91 = 404.
A: 388 does not follow the difference of -91. B: 426 does not follow the difference of -91. D: 462 does not follow the difference of -91.
C is correct because the series follows a constant pattern of subtracting 91 from each term (495 - 91 = 404).
For multi-digit subtraction series, always verify the difference for at least the first three terms to confirm if it is a constant progression or a varying pattern.
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