What will come in place of question mark in the following number series 31 32 36 61 86 ........

Quantitative Aptitude(Banking) Number series

What will come in place of question mark (?) in the following number series?

31, 32, 36, ?, 61, 86

This questions was previously asked in

RBI Assistant Prelims (26 March 2022)

None of these

To find the missing number in the sequence, we need to determine the pattern:

- 31 to 32: Increase by 1

- 32 to 36: Increase by 4

- 36 to ?: We need to determine this step.

- ? to 61: Increase by an unknown amount.

- 61 to 86: Increase by 25

By examining the increases, a pattern emerges. It's likely the series increases with consecutive odd numbers:

- \(32 - 31 = 1\)

- \(36 - 32 = 4\)

- We check if the next increase is 9 (since odd numbers would go 1, 4, 9, 16, 25), which matches the sequence.

Therefore, 36 + 9 = 45.

- The number is 45.

- Option 1: 45 This is the correct answer.

- Option 2: 54

- Option 3: 51

- Option 4: 48

- Option 5: None of these

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