Question Details

Directions: Identify the missing number that completes the pattern.

-31, -65, -133, -269, -541, ?, -2173, -4349

Options

A

-1083

B

-1087

C

-1090

D

-1085

Show Answer

Correct Answer :

Option D

-1085

Solution :

The correct option is -1085.

To identify the missing number that completes the pattern, let us analyze the relationship between consecutive terms in the series.

Let us examine the pattern step-by-step:


1st term to 2nd term: (-31)×2-3=-62-3=-65


2nd term to 3rd term: (-65)×2-3=-130-3=-133


3rd term to 4th term: (-133)×2-3=-266-3=-269


4th term to 5th term: (-269)×2-3=-538-3=-541

From the above calculations, we observe that each term is obtained by multiplying the previous term by 2 and then subtracting 3:


Next Term=(Current Term×2)-3

Applying this rule to find the missing 6th term (represented by '?'):


6th term=(-541)×2-3=-1082-3=-1085

Let us verify the remaining terms in the sequence using this calculated value (-1085):


7th term: (-1085)×2-3=-2170-3=-2173


8th term: (-2173)×2-3=-4346-3=-4349

The pattern holds true throughout the sequence. Thus, the missing number is -1085.

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