Question: Big Dig Mining Company mines three different types of ore: copper, iron, and nickel. Across all their mines, 10% of their output is nickel, 60% is iron, and the rest is copper. They mine 720 tons of nickel a day. How many tons of copper does Big Dig Mining Company mine daily?
Answer: Let R be the total ore output of the company. Of Big Dig’s output, 100 - 10 - 60 = 30% is nickel. Since 720 is 60% of 100% of their output, 720 / R = 60 / 100. Thus, Big Dig mines R = 100 * 720 / 60 = 1200 tons of ore daily. Therefore, Big Dig mines 1200 * 30 / 100 = 360 tons of copper daily. The answer is 360.

Question: McKenna has 34 stuffed animals. Kenley has twice as many as McKenna. Tenly has 5 more than Kenley . How many stuffed animals do the three girls have in all?
Answer: Kenley has 2 * 34 stuffed animals = 68 stuffed animals. Tenly has 68 stuffed animals + 5 = 73 stuffed animals. The three girls total had 34 + 68 + 73 = 175 stuffed animals. The answer is 175.

Question: If it takes 20 minutes to paint a house, how many houses can you paint in 3 hours?
Answer: There are 3 hours * 60 minutes / hour = 180 minutes in 3 hours. You can paint 180 minutes / 20 houses / minute = 9 houses in 3 hours. The answer is 9.

Question: There were 25 peaches in each basket. Five baskets of peaches were delivered to a market. The farmers have eaten 5 peaches. The remaining peaches are packed into smaller boxes of 15 each. How many boxes of peaches are there?
Answer:
The total number of peaches delivered to a market was 5 x 25 = 125. The remaining peaches after 5 were eaten was 150 - 5 = 145. So, there are 120 / 15 = 8 smaller boxes of peaches. The answer is 8.