Evan's dog weighs 63 pounds; it weighs 7 times as much as Ivan's dog. Together, what is the weight of the dogs? Give the rationale and then the answer.
Let's think step by step. Ivan's dog weighs 63 / 7 = 9 pounds. Thus, the two dogs weigh 63 + 9 = 72 pounds.. The answer is: 72.

Edmonton is 220 kilometers north of Red Deer. Calgary is 110 kilometers south of Red Deer. If you travel at 110 kilometers per hour, how long will it take to get from Edmonton to Calgary? Give the rationale and then the answer.
Let's think step by step. Total distance travelled is 220km + 110km = 330 km. Time to travel that far is 330km / 110km / hour = 3 hours.. The answer is: 3.

After complaints from the residents of Tatoosh about the number of cats on the island, the wildlife service carried out a relocation mission that saw the number of cats on the island drastically reduced. On the first relocation mission, 600 cats were relocated from the island to a neighboring island. On the second mission, half of the remaining cats were relocated to a rescue center inland. If the number of cats originally on the island was 1800, how many cats remained on the island after the rescue mission? Give the rationale and then the answer.
Let's think step by step. After the first mission, the number of cats remaining on the island was 1800 - 600 = 1200. If half of the remaining cats on the island were relocated to a rescue center inland, the number of cats taken by the wildlife service on the second mission is 1200 / 2 = 600 cats. The number of cats remaining on the island is 1200 - 600 = 600.. The answer is: 600.