Question: Mandy started reading books with only 8 pages when she was 6 years old. By the time she was twice that age, she was reading books 5 times longer, and 8 years later, she was reading books 3 times longer than that. Presently, she reads books that are 4 times the previous length. How many pages do the books she reads now have?
Answer with step-by-step thinking: Twice the age of 6 is 6 x 2 = 12 years old. At 12 years old, Mandy was reading books 5 x 8 = 40 pages long. 8 years later, Mandy was 12 + 8 = 20 years old. At 20 years old, Mandy was reading books 3 x 40 = 120 pages long. Presently, she reads books that are 120 x 4 = 480 pages long.
So the answer is 480.


Question: A family's water and electricity bills average $30 a month for the first 4 months and $24 a month for the last 2 months. If the family's bills were averaged over all 6 months, what would the average monthly bill be?
Answer with step-by-step thinking: The sum of the bills of the family in the first 4 months is $30 / month x 4 months = $120. The sum of the bills of the family in the last 2 months is $24 / month x $2 = $48. The sum of the bills of the family over the 6 months is $120 + $48 = $168. Hence, their average monthly bill is $168 / 6 months = $28 / month.
So the answer is 28.


Question: Larry jogs for 30 minutes each day. In the first week, he jogs for 3 days while he jogs for 5 days in the second week. How many hours does he jog in total for two weeks?
Answer with step-by-step thinking:
Larry jogs for a total of 3 + 5 = 8 days. Thus, he jogs a total of 8 x 30 = 240 minutes. This is equal to 240 / 60 = 4 hours.
So the answer is 4.