There are six unicorns in the Enchanted Forest. Everywhere a unicorn steps, four flowers spring into bloom. The six unicorns are going to walk all the way across the forest side-by-side, a journey of 9 kilometers. If each unicorn moves 3 meters forward with each step, how many flowers bloom because of this trip? Give the rationale and then the answer.
Let's think step by step. First convert the total length of the journey from kilometers to meters: 9 kilometers * 1000 meters / kilometer = 9000 meters. Then divide this by the length of one step to find the number of steps in the journey: 9000 meters / 3 meters / step = 3000 steps. Then multiply the number of steps by the number of flowers per step to find how many flowers one unicorn creates on the journey: 3000 steps * 4 flowers / step = 12000 flowers. Then multiply the number of flowers per unicorn by the number of unicorns to find the total number of flowers created: 12000 flowers / unicorn * 6 unicorns = 72,000 flowers.. The answer is: 72000.

Beth had 150 students in her 10th-grade class. The following year 30 more students join. In her final year, 15 students left. How many students did Beth have in her class at the end of her final year? Give the rationale and then the answer.
Let's think step by step. Beth had 150 students her 10th - grade year, and added 30 more the following for a total of 150 + 30 = 180 students. In her final year, 15 students left her class, bringing her total to 180 - 15 = 165 students.. The answer is: 165.

Tommy is making 12 loaves of bread. He needs 4 pounds of flour per loaf. A 10-pound bag of flour costs $10 and a 12-pound bag costs $13. When he is done making his bread, he has no use for flour and so he will throw away whatever is left. How much does he spend on flour if he buys the cheapest flour to get enough? Give the rationale and then the answer.
Let's think step by step. He needs 48 pounds of flour because 12 x 4 = 48. He needs 4.8 bags of 10 pound bags because 48 / 10 = 4.8. He therefore needs to buy 5 bags of flour because 4 < 4.8 < 5. He spends $50 if he buys this flour because 5 x 10 = 50. He needs 4 bags of the 12 - pound flour because 48 / 12 = 4. He would spend $52 on the 12 - pound bags because 4 x 13 = 52. He spends $50 if he buys the cheapest flour because 50 < 52.. The answer is: 50.