[Question]: John has 3 children. He and his wife are supposed to buy notebooks for their sons but they couldn't agree on how many to buy. So John bought 2 notebooks for each of his children and John's wife bought 5 notebooks for each of them. How many notebooks did they buy in total for their children?
[Answer]: John bought 2 notebooks for his 3 children: 2 notebooks / child x 3 children = 6 notebooks. The father bought 6 notebooks. John's wife bought 5 notebooks for their three children: 5 notebooks / child x 3 children = 15 notebooks. The mother bought 15 notebooks. Now, the total number of notebooks is 6 notebooks + 15 notebooks = 21 notebooks.
So the answer is 21.

[Question]: Alfred likes to save $1,000.00 over 12 months for his Christmas shopping. He has $100.00 left over from last year's holiday to put towards this year's goal. How much money does Alfred now need to save each month in order to reach his goal in 12 months?
[Answer]: He wants to save $1,000.00 and he has $100.00 left over so he still needs to save 1000 - 100 = $900.00. He wants to save $900.00 over 12 months so that means he needs to save 900 / 12 = $75.00 per month.
So the answer is 75.

[Question]: Justin has a box that is 12 inches in height. The length of the box is 3 times its height and 4 times its width. What is the volume of the box?
[Answer]:
The length of the box is 3 x the height of 12 inches = 36 inches. The width of the box is 36 inches / 4 = 9 inches. The volume of the box is the height of 12 inches x the length of 36 inches x the width of 9 inches = 3,888 cubic inches.
So the answer is 3888.