Along the highway, there are electric poles on one side of the highway and telegraph poles on the other side. The electric poles are all separated by 20 m and the telegraph poles are all separated by 120 m. If an electric and a telegraph pole are both present at the point where the highway begins, after how much distance along the highway will they both be in front of each other again?

Su has two sheets of cloth. One sheet is 261 cm wide and the other sheet is 145 cm wide. She wants to divide the sheets into strips of equal width without wasting any cloth such that they are as wide as possible. How wide should she cut the strips?

In a competitive exam, there are 70 questions. Students can score 2 marks for each correct answer while 1 mark is deducted for each incorrect answer. If Serhat answered 8 questions correctly, how many marks did he get?

Ece and Feyza start walking to the school at the same time every morning. The ratio of the distance of Ece's house to the school and Feyza's house to the school is 8:19. If they both reach the school at the same time, then the ratio of the speeds of walking of Ece and Feyza is