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Multiple Choice Questions

Another number series whose first term is 23 follows the same logic as followed in series ii L and K...........

Quantitative Aptitude(IBPS PO) Number series

Given below there are three number series (I, II, and III). One of the numbers in each series (I, II, and III) is wrong or (odd one out).

Series I: 590, 615, 651, 711, 795, 927

Series II: 64, 164, 285, 510, 546, 770

Series III: 18, 25.5, 40.5, 63, 93, 131

Another number series, whose first term is 23, follows the same logic as followed in series (ii). L and K are the fifth and third terms of the new series respectively, then what is the value of (L - K)?

This questions was previously asked in

IBPS PO Mains (26th November 2022)

View All IBPSPO Previous Year Papers

225

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290

288

280

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Explanation:

- Series I Analysis: The series 590, 615, 651, 711, 795, 927 has a pattern of adding consecutive prime numbers: 25, 36, 60, 84, and 132. However, 651 is wrong; instead, it should be 651.

- Series II Analysis: 64, 164, 285, 510, 546, 770 follows a pattern where each term increases by consecutive perfect squares: 10^2, 11^2, 12^2, etc. The incorrect number is 546.

- Series III Analysis: 18, 25.5, 40.5, 63, 93, 131 is a geometric sequence where each term increases by multiplying by a factor. The pattern is consistent.

- New Series of Analysis and L - K Calculation:

- Following Series II, the new series starts at 23:

- 23 + 10^2 = 123

- 123 + 11^2 = 244

- 244 + 12^2 = 388

- 388 + 13^2 = 555 (Thus, K = 244, L = 555)

- The difference (L - K) = 555 - 244 = 311

?? The correct answer is not 288; the calculation error suggests Option 6 is necessary - which is a hypothetical response, as none amongst the given choices match.

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