Which of the following options will logically replace the question mark (?) to complete the given numerical series?
-12, -25, -52, -107, -218, ?
Correct Answer :
-441
Solution :
The correct option is -441.
To determine the missing number that logically replaces the question mark (?), let us analyze the step-by-step pattern between consecutive terms in the given numerical series:
-12, -25, -52, -107, -218, ?
Let us look at how each term is generated from the preceding term:
From the above steps, we can deduce the general rule for the pattern:
Each term is obtained by multiplying the previous term by 2 and then subtracting consecutive natural numbers (1, 2, 3, 4, 5, ...).
To find the 6th term (?), we multiply the 5th term (-218) by 2 and subtract 5:
Therefore, the missing number in the series is -441.
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