Which number will replace the question mark in the following number series 266 138 74 42 18 ........

Logical Reasoning (MTS) Number series

Which number will replace the question mark (?) in the following number series?

266, 138, 74, 42, ?, 18

This questions was previously asked in

SSC MTS 27th October 2021 Shift-2

- The series is given as: 266, 138, 74, 42, ?, 18

- Let's find the pattern:

- Subtract 128 from 266 to get 138.

- Subtract 64 from 138 to get 74.

- Subtract 32 from 74 to get 42.

- The pattern shows that each number is subtracted by half of the previous subtraction.

- Continuing the pattern:

- Subtract 16 (half of 32) from 42 to find the missing number.

- 42 - 16 = 26

- The missing number is 26, which corresponds to Option 4.

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