In each of the following number series a wrong number is given find out that number 23 45 89 177 363...........

Quantitative Aptitude(IBPS CL) Number series

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

23, 45, 89, 177, 363, 705

This questions was previously asked in

IBPS Clerk (Prelims)

177

363

705

- The series starts at 23 and appears to be doubling and increasing with some increment.

- Let's evaluate the pattern:

- 23 × 2 – 1 = 45

- 45 × 2 – 1 = 89

- 89 × 2 – 1 = 177

- 177 × 2 – 1 = 353 (here it should be 353, not 363)

- 353 × 2 – 1 = 705

- From this pattern, each number should be twice the previous one minus one.

- Based on the correct sequence, option 4: 363 is the incorrect number in the series.

Answer: 363

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