What should come in place of the question mark 39 39 in the following number series 130 115 135 110 ...........

Quantitative Aptitude(IBPS CL) Number series

What should come in place of the question mark '?' in the following number series?

130, 115, 135, 110, ?, 105

This questions was previously asked in

IBPS Clerk Prelims

120

130

140

100

110

- The series is: 130, 115, 135, 110, ?, 105.

- Look at the pattern of alternating increases and decreases.

- From 130 to 115: Decrease by 15.

- From 115 to 135: Increase by 20.

- From 135 to 110: Decrease by 25.

- The pattern is a decrease of 15, then an increase of 20, then a decrease of 25.

- Following this pattern:

- After decreasing by 25, the next step should be an increase of 30.

- Adding 30 to 110 gives 140.

- Correct Answer: Option 3, 140

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