Level 2
During a school anniversary celebration, pupils were required to line along both sides of the corridor to welcome the Guest-Of-Honor from the foyer to the hall. On the left row, the girls would stand 1 m apart from each other at an equal distance apart. On the right row, the boys would stand 2 m apart from each other. Both rows would have a girl and a boy standing at the beginning and at the end of the corridor. The corridor was 50 m long. How many pupils were required to line both sides of the corridor?
Level 3
Some trees were planted in a row at equal distances. The distance between the 1st and the 3rd tree was 6 m. What was the distance between the 1st and the 8th tree?
