Answer this question:At a CD store, 40% of the CDs cost $10 each, and the rest cost $5 each. Prince bought half the CDs sold at $10 each, and all of the CDs sold at $5 each. If the total number of CDs was 200, how much money did Prince spend on buying the CDs?
The number of CDs selling at $10 each at the store is 40 / 100 * 200 = 80. This means the store sells 200 - 80 = 120 CDs at $5 each. Prince bought 1 / 2 * 80 = 40 of the CDs selling at $10 each. The total amount of money Prince paid for the 40 CDs selling at $10 each is $40 * 10 = $400. If he bought all the CDs selling at $5 each, he paid a total of $5 * 120 = $600. For all the CDs he bought, Prince spent $600 + $400 = $1000.
The answer is 1000.

Answer this question:Hannah ran 9 kilometers on Monday. She ran 4816 meters on Wednesday and 2095 meters on Friday. How many meters farther did she run on Monday than Wednesday and Friday combined?
Wednesday + Friday = 4816 + 2095 = 6911 meters. 9 km = 9000 meters. 9000 - 6911 = 2089 meters. Hannah ran 2089 meters farther on Monday than Wednesday and Friday.
The answer is 2089.

Answer this question:Alexa was on vacation for 3/4ths of the time it took Ethan to learn 12 fencing tricks. Joey spent half as much this time (that Ethan spent learning the tricks) learning to swim. If Alexa spent a week and 2 days on vacation, how many days did it take Joey to learn swimming?
There are 7 days in one week so one week and 2 days = 7 + 2 = 9 days. Call the time Ethan spends learning tricks e. Alexa spent 9 days on vacation which is 3 / 4ths of the time Ethan spent learning 12 fencing tricks, hence (3 / 4)e = 9 days. If we multiply both sides of this equation by 4 / 3, we get e = (4 / 3) * 9 days = 12 days. Joey spent half of 12 days which is 12 / 2 = 6 days to learn swimming.
The answer is 6.

Answer this question:Lexie is 6 years older than her brother and her sister is twice her age. If Lexie is 8, what is the age difference between her brother and her sister?
Lexie's brother is 8 - 6 = 2 years old. Her sister is 8 x 2 = 16 years old. The age difference between her brother and sister is 16 - 2 = 14 years.
The answer is 14.