Q: Mr. Fortchaud turns on his heater on the 1st of November, 2005. The fuel tank was then full and contained 3,000 L. On January 1, 2006, the tank counter indicated that 180 L remained. Mr. Fortchaud again filled his tank completely. On 1 May 2006, Mr. Fortchaud decided to stop heating and he read 1,238 L on the meter. What the volume of fuel oil that was used between 1 November 2005 and 1 May 2006?
A: I calculate consumption between November 1, 2005 and January 1, 2006: 3,000 – 180 = 2820 L. I calculate consumption between January 1, 2006 and May 1, 2006: 3,000 – 1238 = 1762 L. I calculate the total consumption between November 1st and May 1st: 2,820 + 1,762 = 4582 L. The answer is 4582.

Q: Quincy just bought a car using a 5 year loan with no interest. He put $5,000.00 down as a down payment making his monthly payment $250.00. What is the price of the car?
A: 1 year has 12 months and his loan is for 5 years so that's 12 * 5 = 60 months. His car payment is $250.00 a month for 60 months so 250 * 60 = $15,000. He also put a down payment of $5,000 on the car so the total price of the car is $5,000 + $15,000 = $20,000 car price. The answer is 20000.

Q: Mr Julien's store has 400 marbles remaining after the previous day's sales. Twenty customers came into the store, and each bought 15 marbles. How many marbles remain in the store?
A:
If each of the 20 customers bought 15 marbles, then they bought 20 * 15 = 300 marbles in total from Mr Julien's store. The number of marbles remaining in the store is 400 - 300 = 100 marbles. The answer is 100.