Determine the multiples of each student's number choice: Lucas: 350 = 2*5*5*7 Ana: 23 = 23*1 Júlia: 955 = 5*191 Felipe: 238 = 2*7*17 Paula: 805 = 5*723 2Identify the factors of each student's number choice: Lucas: Factors of 350 = 2, 5, 7 Ana: Factors of 23 = 23, 1 Júlia: Factors of 955 = 5, 191 Felipe: Factors of 238 = 2, 7, 17 Paula: Factors of 805 = 5, 7, 23 3Analyze the factors to determine which number the teacher chose: The number chosen by the teacher must have factors that are common among the multiples chosen by the students. The common factors among the multiples chosen are 5 and 7. Therefore, the number chosen by the teacher is 35 (57). 4Identify the students who guessed correctly: Lucas, Júlia, and Paula guessed correctly because their numbers are multiples of 35.