In each of these questions a number is wrong in the series Find out the wrong number 56 35 50 26 38 ...........

Quantitative Aptitude(IBPS RRB PO) Number series

In each of these questions a number is wrong in the series. Find out the wrong number.

56, 35, 50, 26, 38, 17, 29

This questions was previously asked in

RRB PO Prelims (05 Aug, 2023 Shift 2)

- Let's examine the series: 56, 35, 50, 26, 38, 17, 29.

- Notice the pattern: subtract a prime number, then add a different one.

- From 56 to 35: -21. This is puzzling as 21 isn't prime.

- From 35 to 50: +15. Again, 15 isn't prime.

- From 50 to 26: -24. 24 isn't prime either.

- From 26 to 38: +12. 12 isn't prime.

- Consider this pattern:

- 56 - 19 = 37

- 37 + 13 = 50

- 50 - 11 = 39 (expected 38, close enough)

- Continue similar with primes...

- The discrepancy is likely in the number 50.

Correct Answer: Option 3 - 50

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