The novel that everyone is reading for English class has half as many pages as their history book. Their science book has 4 times the amount of pages as their novel. If the history book has 300 pages, how many pages does their science book have? Think carefully first, then make a decision:
Their novel is half as long as their 300 - page history book so it is 300 / 2 = 150 pages. Their science book has 4 times the amount of pages as their novel, which is 150 pages, so their science book has 4 * 150 = 600 pages. So, the answer is 600.