Q: Ibrahim wants to buy an MP3 player for 120 euros and a CD for 19 euros. He has 55 euros in savings. His father participates in his purchase by giving him 20 euros. How much money does Ibrahim lack?
A: The total price of the purchases is 120 + 19 = 139 euros. The amount of money he has after his father's help is 55 + 20 = 75 euros. The purchase amount is 139 euros, so he is missing 139 75 = 64 euros. The answer is 64.

Q: 5/8 of shoppers at All Goods Available store prefer to avoid the check-out line on weekends and instead go through the express lane. If the number of shoppers in the store is 480, calculate the number of shoppers who pay at the check-out lane.
A: At the store, 5 / 8 of shoppers prefer to avoid the check - out line, a total of 5 / 8 * 480 = 300. The total number of shoppers at the store is 480; those who prefer the check - out line is 480 - 300 = 180. The answer is 180.

Q: John is an eccentric millionaire. He decides to fill his swimming pool with bottled water. A cubic foot of water is 25 liters. His pool is 10 feet deep and 6 feet by 20 feet. A liter of water costs $3. How much does it cost to fill the pool?
A:
The pool is 10 * 6 * 20 = 1200 cubic feet. That means it is 25 * 1200 = 30000 liters. So it cost 3 * 30,000 = $90,000. The answer is 90000.