[Question]Dorothy, Julia, and Robert go to the store to buy school supplies. Dorothy buys half as many pens as Julia. Julia buys three times as many pens as Robert. Robert buys 4 pens. If one pen costs $1.50, how much money did the three friends spend in total on pens?
[Answer]Julia buys 4 * 3 = 12 pens. Dorothy buys 12 / 2 = 6 pens. The total number of pens purchased is 4 + 12 + 6 = 22 pens. The total cost of the pens is 22 * $1.50 = $33. The answer is 33.
Q: Erika and her 3 siblings are drawing with chalk outside. Another 3 friends join them and ask if they can help with the drawing. Erika loses 2 pieces of chalk as they are counting and the group realizes there isn't enough chalk for everyone. Erika's mom brings out another 12 pieces of chalk for them to share and there is now enough chalk for everyone to have 3 pieces each. How many pieces of chalk did Erika and her siblings originally have?
A: Altogether, there are 1 Erika + 3 siblings + 3 friends = 7 people drawing outside. The group has a total of 7 people * 3 pieces of chalk each = 21 pieces of chalk altogether. Before Erika's mom helped, they had 21 total pieces of chalk - 12 pieces of chalk Erika's mom brought = 9 pieces of chalk. Then adding the chalk that Erika lost shows that the group originally had 9 pieces of chalk + 2 lost pieces of chalk = 11 pieces of chalk. The answer is 11.
Question: Denver uses 7 pieces of wood for each birdhouse and he pays $1.50 for each piece of wood. If he makes a $5.50 profit per birdhouse, how much will Denver charge to Danny for buying two birdhouses?
Answer: The cost for making one birdhouse is $1.50 x 7 = $10.50. So the selling price of one birdhouse is $10.50 + $5.50 = $16. Thus, Denver will charge Danny $16 x 2 = $32 for the two birdhouses. The answer is 32.
[Question]Bruce can make 15 batches of pizza dough using a sack of flour. If he uses 5 sacks of flour per day, how many pizza doughs can he make in a week?
[Answer]He can make 15 x 5 = 75 batches of pizza dough per day. Therefore, Bruce can make 75 x 7 days in a week = 525 batches of pizza dough in a week. The answer is 525.
Q: Rita is reading a five-chapter book with 95 pages. Each chapter has three pages more than the previous one. How many pages does the first chapter have?
A: Let P be the number of pages in the first chapter. The second chapter has P + 3 pages. The third chapter has P + 3 + 3 = P + 6 pages. The fourth chapter has P + 6 + 3 = P + 9 pages. The fifth chapter has P + 9 + 3 = P + 12 pages. The whole book has P + 3 + P + 6 + P + 9 + P + 12 = 5P + 30 = 95 pages. Thus, without the 30 extra pages from additional chapters, 5P = 95 - 30 = 65 pages. Therefore, the first chapter had P = 65 / 5 = 13 pages. The answer is 13.
Question: Each year a store decreased the price of a certain model of TV by $35. If the price in 2001 was $1950, what was the price in 2009?
Answer:
The period the store had the TV was 2009 - 2001 = 8 years. The TV decreased by $35 / year * 8 years = $280. So the price in 2009 was $1950 - $280 = $1670. The answer is 1670.