Lizzy: Joan is answering English and Math exams with 30 and 15 questions, respectively. The English exam is to be completed in 1 hour and the Math exam in 1.5 hours. If Joan wants to spend an equal amount of time on each question, how many more minutes does she have in answering each question on the Math exam than the English exam?.
Me: Hmmm, let me think. I think this is the detailed solution:
Joan is given 1 x 60 = 60 minutes to answer the English exam. So Joan will spend 60 / 30 = 2 minutes for each English question. She is given 1.5 x 60 = 90 minutes to answer the Math exam. So, she will spend 90 / 15 = 6 minutes for each Math question. Hence, Joan has 6 - 2 = 4 minutes more for answering each question in Math than in English. Final answer: 4.