Multiple Choice Questions

Directions Answer the questions based on the information given below Series X 66 148 270 440 666 956...........

Quantitative Aptitude (SBI-PO) Number series

Directions: Answer the questions based on the information given below.

Series X : 66, 148, 270, 440, 666, 956

Series Y : 138, 148, 174, 224, 346, 516

Series Z : 316, 541, 830, 1191, 1632, 2161

Subsequent terms in all the given series should follow the given pattern: 1 more than the square of a consecutive odd number.

Which of the following series does not follow this pattern?

This questions was previously asked in

SBI PO Mains (30 Jan, 2023)

Only X

Only Y

Only Z

Both X and Y

Both Y and Z

- Series X: Terms are 1 more than the squares of consecutive odd numbers starting with 8. Calculations: 8^2+1, 10^2+1, 12^2+1, etc.

- Series Y: Terms do not follow the pattern as the second number, 148, does not fit. Calculations: 12^2+1 equals 145, not 148.

- Series Z: Terms are 1 more than the squares of consecutive odd numbers starting with 17. Calculations: 17^2+1, 19^2+1, 21^2+1, etc.

- Conclusion: Series Y does not follow the given pattern. Series Z follows the pattern.

- Correct Answer: Option 2, Only Y

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