Explain simply why 3 is the correct answer to: John writes 3 stories every week. Each short story is 50 pages. He also writes a novel that is 1200 pages each year. Each sheet of paper can hold 2 pages. Over 12 weeks, how many reams of paper does he need to buy if a ream contains 500 sheets?. Explanation:
He writes 3 * 50 = 150 pages a week. That means he writes 150 * 52 = 7800 pages of short stories a year. So he writes 7800 + 1200 = 9000 pages a year. So he needs 9000 / 2 = 4500 sheets of paper. That means he needs 4500 / 500 = 9 reams of paper.