HomeAptitudeFind out the wrong number in the series.: 3, 7, 15, 39, 63, 127, 255, 511 29. Find out the wrong number in the series.: 3, 7, 15, 39, 63, 127, 255, 511By Admin / September 6, 2025 [A]. 7 [B]. 15 [C]. 39 [D]. 63 ✅ The correct answer is option C. Go on multiplying 2 and adding 1 to get the next number. So, 39 is wrong.
1. Two ships are sailing in the sea on the two sides of a lighthouse. The angle of elevation of the top of the lighthouse is observed from the ships are 30° and 45° respectively. If the lighthouse is 100 m high, the distance between the two ships is: Leave a Comment / Aptitude, Height-and-Distance / By Admin
2. A man standing at a point P is watching the top of a tower, which makes an angle of elevation of 30° with the man’s eye. The man walks some distance towards the tower to watch its top and the angle of the elevation becomes 60°. What is the distance between the base of the tower and the point P? Leave a Comment / Aptitude, Height-and-Distance / By Admin