Question: John gets $30 from his grandpa and 3 times that much from his grandma. How much did he get from the two grandparents?
Answer with step-by-step thinking: His grandma gave 30 * 3 = $90. So he got a total of 30 + 90 = $120.
So the answer is 120.

Question: Maria is baking cookies for Sally. Sally says that she wants 1/4 of her cookies to have nuts in them, 40% to have chocolate chips in them, and the remainder to have nuts and chocolate chips in them. When she adds nuts to the cookies, she uses 2 nuts per cookie. If she makes 60 cookies, how many nuts does she need?
Answer with step-by-step thinking: 35% of the cookies have nuts and chocolate chips because 100 - 25 - 40 = 35. 60% of the cookies have nuts in them because 25 + 35 = 60. She makes 36 cookies with nuts in them because 60 x .6 = 36. She needs 72 nuts because 36 x 2 = 72.
So the answer is 72.

Question: Jenny wants to read 3 books in the next 10 days. She can read 100 words per hour. If the first book has 200 words, the second book has 400 words, and the third book has 300 words, how many minutes per day, on average, should she spend reading?
Answer with step-by-step thinking:
She wants to read 200 + 400 + 300 = 900 pages total. She needs to spend 900 / 100 = 9 hours reading in the next three weeks. In minutes, she will need to spend 9 * 60 = 540 minutes. Thus, she should spend 540 minutes / 10 days = 54 minutes per day reading.
So the answer is 54.