Question: A group of 300 athletes spent Saturday night at Ultimate Fitness Camp. The next morning, for 4 hours straight, they left the camp at a rate of 28 athletes per hour. Over the next 7 hours, a new group of athletes trickled into the camp at a rate of 15 athletes per hour. Immediately thereafter, the camp gate was shut and everyone went to bed. What is the difference in the total number of athletes in the camp over the two nights?
Answer with step-by-step thinking: The number that left the camp on Saturday morning was 4 * 28 = 112 athletes. This means that in the camp there remained 300 - 112 = 188 athletes. The new group trickling in on Sunday morning comprised 7 * 15 = 105 athletes. The number that slept at the camp on Sunday night is therefore 188 + 105 = 293 athletes. Since there were 300 athletes on Saturday night, the difference is 300 - 293 = 7 athletes.
So the answer is 7.


Question: Mr. Alvarez spends $36 on diesel fuel each week. If the cost of diesel fuel is $3 per gallon, how many gallons of diesel fuel does Mr. Alvarez use in two weeks?
Answer with step-by-step thinking: In a week, Mr. Alvarez uses $36 / $3 = 12 gallons a week. So in two weeks, he uses 12 x 2 = 24 gallons.
So the answer is 24.


Question: At the Delicious Delhi restaurant, Hilary bought three samosas at $2 each and four orders of pakoras, at $3 each, and a mango lassi, for $2. She left a 25% tip. How much did the meal cost Hilary, with tax, in dollars?
Answer with step-by-step thinking:
The samosas cost 3 * 2 = 6 dollars each. The pakoras cost 4 * 3 = 12 dollars each. The food came to 6 + 12 + 2 = 20 dollars. The tip was an additional 20 * .25 = 5 dollars. The total is 20 + 5 = 25.
So the answer is 25.