What should come in place of ‘?’ in the following number series?

210, 185, 165, 150, 140, ?

- 120
- 130
- 160
- 135
- 145

Option 4 : 135

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Considering the above series,

210, 185, 165, 150, 140, ?

The logic of the series can be explained as,

210 – 185 = 25

185 – 165 = 20

165 – 150 = 15

150 – 140 = 10

140 – ? = 5

**∴**** The value of ? is 135**

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