[Question]: John reads his bible every day. He reads for 2 hours a day and reads at a rate of 50 pages an hour. If the bible is 2800 pages long how many weeks will it take him to read it all?
[Answer]: He reads 2 * 50 = 100 pages a day. So he reads 7 * 100 = 700 pages a week. So it takes 2800 / 700 = 4 weeks.
So the answer is 4.

[Question]: A dragon hoards jewels and gold in its cave. A jealous king snuck in and stole three prize jewels. The dragon burned him to a crisp and stole back its jewels, along with twice as many of the king’s crown jewels from his crown that melted in the dragon’s fire. The new jewels were a third of the number of jewels the dragon had owned before. How many jewels did the dragon own in the end?
[Answer]: The dragon stole 2 * 3 = 6 of the king’s crown jewels. The dragon owned 6 * 3 = 18 jewels before the theft. Thus, the dragon owned 18 + 6 = 24 jewels in the end.
So the answer is 24.

[Question]: The price of electricity went up by 25%. John's old computer used 800 watts and his new computer uses 50% more. If the old price of electricity was 12 cents per kilowatt-hour, how much does his computer cost, in dollars, to run for 50 hours?
[Answer]:
His new computer uses 800 * .5 = 400 watts more than his old computer. So it users 800 + 400 = 1200 watts. That is 1200 / 1000 = 1.2 kw. Electricity cost 12 * .25 = 3 cents more than it used to. So it now cost 12 + 3 = 15 cents per kwh. He used 1.2 * 50 = 60 kwh. So he paid 15 * 60 = 900 cents per kwh. So he paid 900 / 100 = $9.
So the answer is 9.