In each of the following number series a wrong number is given Find out that number 18 35 69 136 273...........

Quantitative Aptitude(IBPS CL) Number series

In each of the following number series, a wrong number is given. Find out that number.

18, 35, 69, 136, 273, 545

This questions was previously asked in

IBPS Clerk (Prelims)

136

273

- Let's examine the pattern. Typically, a number series follows a logical or mathematical rule.

- Starting with 18, each number seems to double and then add 1.

- 18 doubled is 36, minus 1 gives 35. This fits.

- 35 doubled is 70, minus 1 gives 69. This fits.

- 69 doubled is 138, minus 1 gives 137. This doesn't fit.

- 136 doesn't seem to follow the pattern. When doubling 69, it should result around 137, not 136.

- The pattern can also be confirmed with subsequent numbers: 136 doubled doesn't logically lead to 273.

- Correct Answer: Option:4, 136

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