[Question]Ali, Nada, and John have a total of $67 in their wallets. Ali has $5 less than Nada and John has 4 times more than Nada. How much money does John have?
[Answer]Let's say that N is what Nada has, J is what John has, and A is what Ali has. We know that A = N - 5 and J = 4N. We also know that: N + A + J = $67. We can substitute the equations from step 1 into the equations from step 2 to get: N + 4N + (N - 5) = $67. Combining like terms gets us 6N - 5 = $67. So, N = ($67 + 5) / 6 = $12. Substituting $12 back into the equation J = 4 N, we find John has 4 x 12 = $48. The answer is 48.
Q: Jessica just got her driving permit. She must complete 50 hours of driving with a parent to get her driver's license. It takes 20 minutes to drive to school. If she drives to and from school every day, how many school days will it take Jessica to meet the 50-hour driving requirement?
A: Jessica will drive 20 minutes, twice every school day (to and from school), so 20 minutes x 2 trips = 40 minutes each day. There are 60 minutes in 1 hour, so 50 hours of driving x 60 minutes / hour = 3,000 minutes. If you take the 3,000 minutes she needs to drive / 40 minutes driving each day = 75 school days to drive 50 hours. The answer is 75.
Question: John is a hack author. He writes a book every 2 months. He has been writing for 20 years and has earned an average of $30,000 per book. How much money has he made writing?
Answer: He writes 12 / 2 = 6 books a year. That means he has written 6 * 20 = 120 books. So he has made 120 * 30,000 = $3,600,000 from writing. The answer is 3600000.
[Question]The water pressure of a sink has a steady flow of 2 cups per 10 minutes for the first 30 minutes. It still flows at 2 cups per 10 minutes for the next 30 minutes after. For the next hour, the water pressure maximizes to 4 cups per 10 minutes and stops. Shawn now has to dump half of the water away. How much water is left?
[Answer]For the first 30 minutes, 3 * 2 = 6 cups of water came out. For the next 30 minutes, 3 * 2 = 6 cups of water came out. For the next hour, 6 * 4 = 24 cups of water came out. A total of 6 + 6 + 24 = 36 cups of water came out. Shawn had to dump water which left 36 / 2 = 18 cups of water. The answer is 18.
Q: Juvy has a garden that has 20 rows with 10 plants in each row. She plants parsley in the first 3 rows and rosemary in the last two rows. The rest of the rows will be planted with chives. How many chives will Juvy plant?
A: Juvy planted 3 + 2 = 5 rows with parsley and rosemary. So, 20 - 5 = 15 rows will be planted with chives. Therefore, 15 x 10 = 150 chives will be planted. The answer is 150.
Question: Mrs. Smith wanted to buy wears worth $500. She went to a boutique with the $500 but by the time she had picked out everything she liked, she realized that she would need two-fifths more money than she had. If the shop owner gave her a discount of 15%, how much more money will she still need?
Answer:
Two fifths of $500 is (2 / 5) * $500 = $200. She needed $200 more than $500 which is $200 + $500 = $700. 15% of $700 is (15 / 100) * $700 = $105. She was given a $105 discount so she has to pay $700 - $105 = $595. She would still need $595 - $500 = $95. The answer is 95.