189 186 181 174 165 155 141 ........

Qunatitative Aptitude (RBI Ast) Number series

Direction : Find the wrong number in following number series.

189, 186, 181, 174, 165, 155, 141

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RBI Assistant 2020

189

181

165

155

141

- Observe the series: 189, 186, 181, 174, 165, 155, 141.

- The differences between the numbers are: 3, 5, 7, 9, 10, 14.

- Notice the pattern in differences should consistently increase by 2.

- Sequence should be: 3, 5, 7, 9, 11, 13.

- 155 should be 152 to maintain the increasing-difference pattern.

- So, option:4- 155 is indeed the wrong number in this series.

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