1. The number of boys in a class is 5% less than 4, and the number of girls is more than 40%? 2. It takes 6 hours for ship a to travel from the east port to the West Port, and 4 hours for ship B to travel from the West Port to the east port. Now the two ships start from the east port and the West Port at the same time. As a result, they meet at the place 18 kilometers away from the midpoint. How many kilometers is the distance between the east port and the West Port? 3. There are 162 more male workers than female workers in a factory. Now one eleventh of the male workers and 12 female workers are selected to participate in the speech contest. The number of male workers is twice that of female workers. How many female workers are there in this factory? 4. It costs 5.6 yuan to buy three pencils, two erasers and two exercise books in a shop. If it costs 5.9 yuan to buy two pencils, three erasers and three exercise books, how much is each pencil? 5. For a batch of square bricks, if they are put together into a large rectangle with the ratio of length to width of 5:4, the remaining 38 pieces will be left. If they are changed into a large rectangle with the length and width increased by one piece each, the remaining 53 pieces will be left behind. So, how many square bricks are there in total?

1. The number of boys in a class is 5% less than 4, and the number of girls is more than 40%? 2. It takes 6 hours for ship a to travel from the east port to the West Port, and 4 hours for ship B to travel from the West Port to the east port. Now the two ships start from the east port and the West Port at the same time. As a result, they meet at the place 18 kilometers away from the midpoint. How many kilometers is the distance between the east port and the West Port? 3. There are 162 more male workers than female workers in a factory. Now one eleventh of the male workers and 12 female workers are selected to participate in the speech contest. The number of male workers is twice that of female workers. How many female workers are there in this factory? 4. It costs 5.6 yuan to buy three pencils, two erasers and two exercise books in a shop. If it costs 5.9 yuan to buy two pencils, three erasers and three exercise books, how much is each pencil? 5. For a batch of square bricks, if they are put together into a large rectangle with the ratio of length to width of 5:4, the remaining 38 pieces will be left. If they are changed into a large rectangle with the length and width increased by one piece each, the remaining 53 pieces will be left behind. So, how many square bricks are there in total?

1. The number of boys in a class is 5% less than 4, and the number of girls is 40% more than 6. How many students are there in this class? Let m be the number of students in the class, then the number of boys is m * 5 / 9-4, and the number of girls is m * 40% + 6. From this, we can get the equation: M = (m * 5 / 9-4) + (m * 40% + 6)