[Question]Jack and Jill race up the hill to see who gets there fastest. Jack ran up the first half of the hill in 19 seconds. He finished running up the hill 7 seconds before Jill did. If Jill finished the race in 32 seconds, how long did it take Jack to run up the second half of the hill?
[Answer]Since Jack was faster than Jill, his total running time must have been 32 - 7 = 25 seconds. Subtracting the the time he spent running up the first half of the hill shows that it took 25 - 19 = 6 seconds to run up the second half of the hill. The answer is 6.

[Question]Winston had 10 gallons of gas in his car’s gas tank. He drives to the store and uses 6 gallons of gas. Then he drives to the doctor’s office and uses 2 gallons of gas. If the tank can hold up to 12 gallons of gas, how many gallons of gas will Winston need to refill the entire tank?
[Answer]After driving to the store and doctor’s office, Winston has 10 - 6 - 2 = 2 gallons of gas left in the tank. To refill the entire tank, Winston needs 12 - 2 = 10 gallons of gas. The answer is 10.

[Question]4 friends are running a 4 x 100 relay race. Mary ran first and took twice as long as Susan. Susan ran second and she took 10 seconds longer than Jen. Jen ran third and finished in 30 seconds. Tiffany ran the last leg and finished in 7 seconds less than Mary. How many seconds did it take the team to finish the race?
[Answer]Susan's time was 30 seconds + 10 seconds = 40 seconds. Mary's time was 40 seconds * 2 = 80 seconds. Tiffany's time was 80 seconds - 7 seconds = 73 seconds. The total time for the team was 80 seconds + 40 seconds + 30 seconds + 73 seconds = 223 seconds. The answer is 223.

[Question]James has 28 marbles. He puts them into 4 bags. He puts the same number in each bag. He then gives one bag away. How many marbles does James have left?
[Answer]
James has 28 marbles / 4 bags = 7 marbles per bag. James has 28 marbles - 7 marbles = 21 marbles remaining. The answer is 21.