Joy can read 8 pages of a book in 20 minutes. How many hours will it take her to read 120 pages? Give the rationale and then the answer.
Let's think step by step. In one hour, there are 3 sets of 20 minutes. So, Joy can read 8 x 3 = 24 pages in an hour. It will take her 120 / 24 = 5 hours to read 120 pages.. The answer is: 5.

In a national park, the number of redwoods is 20% more than the number of pines. If there are 600 pines in the national park, calculate the total number of pines and redwoods that are there. Give the rationale and then the answer.
Let's think step by step. If there are 600 pines, there are 20 / 100 * 600 = 120 more redwoods than pine trees in the national park. In total, there are 120 + 600 = 720 redwoods in the national park. Altogether, there are 720 + 600 = 1320 pines and redwoods in the national park.. The answer is: 1320.

Arnel had ten boxes of pencils with the same number of pencils in each box. He kept ten pencils and shared the remaining pencils equally with his five friends. If his friends got eight pencils each, how many pencils are in each box? Give the rationale and then the answer.
Let's think step by step. Arnel shared 5 x 8 = 40 pencils with his friends. So, he had 10 + 40 = 50 pencils in all. Therefore, each box had 50 / 10 = 5 pencils inside.. The answer is: 5.