Find the wrong number in the series given below : 28, 84, 112, 196, 308, 504, 872 2. Raj travels a straight distance of 80 meters from point X to Y. He turns right and walks 50 meters, then turns right again and walks 70 meters. Finally, he turns right and walks 50 meters. How far is he from the starting point?

Explanation

Ans. (d) 812 28 84 112 196 308 504 872 +28 +84 +112 +196 +308 From the above number series it is clear that in place of 872, there should be 812. Hence, 872 is the wrong number in the series. Raj's destination path will be as follows: X C 80 m Y 50 m 50 m B 70 m A ∴ The distance from X to Y is = 80 m. ∵ AB = 70 m. ∴ The distance between the starting point X and the ending point C is = 80 – 70 = 10 m.