Question: Bernie has a collection of 18 unique postcards. He decided to sell half his collection for $15 per postcard. After he has successfully sold his postcards he decided to spend all the earned money to buy new postcards for $5 each. How many postcards does Bernie have after all his transactions?
Answer: Half of Bernie's collection means 18 * 0.5 = 9 postcards. So he was able to sell 9 postcards for 9 * 15 = $135. He decided to spend all of his money on new postcards for $5 each, so he was able to buy 135 / 5 = 27 new postcards. This means Bernie has 9 + 27 = 36 postcards after all. The answer is 36.
[Question]Mike wants to buy a new car. He has chosen a red car for $35000. To be able to pay this price, he needs to loan part of the money from the bank, at a rate of 15%. How much money in total will Mike need to pay for the car, if he has to take $20000 from the bank?
[Answer]The rate of the loan is 15%, which means Mike needs to give the bank an additional 20000 * 15 / 100 = $3000. So the car will cost him 35000 + 3000 = $38000. The answer is 38000.
Q: Austin and Jake start descending from the 9th floor of a building at the same time. Austin uses the elevator and Jake uses the stairs, descending 3 steps every second. The stairs have 30 steps across each floor. If the elevator will take a minute to get to ground level, how many seconds later will Jake get to the ground floor?
A: Jake has to descend 30 steps on 9 floors for a total of 9 * 30 = 270 steps. He descends 3 steps every second so he will descend 270 steps in 270 / 3 = 90 seconds. Austin will get down after only a minute (60 seconds) so Jake will get down 90 - 60 = 30 seconds later. The answer is 30.
Question: Amy, Jeremy, and Chris have a combined age of 132. Amy is 1/3 the age of Jeremy, and Chris is twice as old as Amy. How old is Jeremy?
Answer: Let x represent the age of Jeremy. Amy:(1 / 3)x. Chris:2(1 / 3)x = (2 / 3)x. Total:x + (1 / 3)x + (2 / 3)x = 132. 2x = 132. x = 66 years old. The answer is 66.
[Question]Kristine has 7 more CDs than Dawn. If Dawn has 10 CDs, how many CDs do they have together?
[Answer]Kristine has 10 + 7 = 17 CDs. Thus, they both have 10 + 17 = 27 CDs together. The answer is 27.
[Question]Angie is part of a household with shared expenses and contributes $42 a month for necessities. She has a salary of $80 per month. She also pays a share of the household taxes each month. At the end of this month, she had $18 left over. How much did she pay in taxes this month?
[Answer]
Angie earned 80 and paid 42 for necessities, so she had 80 - 42 = $38 left. Angie had 18 left after paying taxes, so her share of the taxes was 38 - 18 = $20 this month. The answer is 20.