Question: Bob, a marathon runner, is preparing for a race. He runs a total of 70 miles in the 3 days leading up to the race. On day one he runs 20 percent of the total miles and on day 2 he runs 50 percent of the remaining miles. How many miles does he run on day three to complete the 70 miles?
Answer: Step-by-step reasoning process: Day 1: 70(.20) = 14 miles. 70 - 14 = 56 miles remaining. Day 2:56 / 2 = 28 miles. 56 - 28 = 28 miles remaining.
So the answer is 28.

Question: Gnuff charges a flat rate of $20 per tutoring session plus $7 per minute. The total amount paid for Gnuff for tutoring for one session is $146. How many minutes did Gnuff tutor for?
Answer: Step-by-step reasoning process: First find the amount paid just for the per - minute fee, which is $146 - $20 = $126. Then divide that number by the per - minute rate to find the number of minutes: $126 / $7 per minute = 18 minutes.
So the answer is 18.

Question: Janet has to drive 30 miles east from home to see her dermatologist and 50 miles west from home to see her gynecologist. If she has appointments with both doctors on the same day, how many gallons of gas does she use driving to both appointments and back home again, if her car gets 20 miles per gallon?
Answer: Step-by-step reasoning process: First find the total distance she drives to get to the dermatologist and back to her house: 30 miles * 2 = 60 miles. Then find the total distance she drives to get to the gynecologist and back to her house: 50 miles * 2 = 100 miles. Then add those two amounts to find how far she drives total: 60 miles + 100 miles = 160 miles. Then divide that distance by her car's gas mileage to find how many gallons of gas she needs: 160 miles / 20 miles / gallon = 8 gallons.
So the answer is 8.

Question: CJ, KJ, and AJ collect stamps. CJ has 5 more than twice the number of stamps that KJ has, and KJ has half as many as AJ. If the three boys have 930 stamps all together, how many stamps does AJ have?
Answer:
Step-by-step reasoning process: Let x represent the number of stamps for AJ. KJ:x / 2 stamps. CJ:5 + 2(x / 2) = 5 + x. Total:x + (x / 2) + 5 + x = 930. (5 / 2)x + 5 = 930. (5 / 2)x = 925. x = 925(2 / 5) = 370 stamps.
So the answer is 370.