Louie sells Dodge, Hyundai, and Kia vehicles, and his company has 400 vehicles for sale on the store's parking lot. Half of the vehicles on the lot are Dodge, and there are half as many Hyundai vehicles on the lot as there are Dodge vehicles. How many Kia vehicles are on the lot? Give the rationale and then the answer.
Let's think step by step. Half of the 400 vehicles for sale on the lot are Dodges, or a total of 400 / 2 = 200 Dodge vehicles. Since there are half as many Hyundai vehicles on the lot as there are Dodge vehicles, then there are 200 / 2 = 100 Hyundai vehicles on the lot. Since the remainder of the vehicles are Kias, then there are 400 - 200 - 100 = 100 Kia vehicles for sale on the lot.. The answer is: 100.

Rebecca makes her own earrings out of buttons, magnets, and gemstones. For every earring, she uses two magnets, half as many buttons as magnets, and three times as many gemstones as buttons. If Rebecca wants to make 4 sets of earrings, how many gemstones will she need? Give the rationale and then the answer.
Let's think step by step. Four sets of earrings is 2 * 4 = 8 earrings. Since for one earring, she uses two magnets, for eight earrings she uses 2 * 8 = 16 magnets. Since she uses half as many buttons as magnets, then for 8 earrings she would use 16 / 2 = 8 buttons. Since she uses three times as many gemstones as buttons, then in 8 earrings, she will use 8 * 3 = 24 gemstones.. The answer is: 24.

Adam has an orchard. Every day for 30 days he picks 4 apples from his orchard. After a month, Adam has collected all the remaining apples, which were 230. How many apples in total has Adam collected from his orchard? Give the rationale and then the answer.
Let's think step by step. During 30 days Adam picked 4 * 30 = 120 apples. So in total with all the remaining apples, he picked 120 + 230 = 350 apples from his orchard.. The answer is: 350.