Question: Iain has 200 pennies. He realizes that 30 of his pennies are older than he is. If he wishes to get rid of these pennies and then throw out 20% of his remaining pennies, how many will he have left?
Answer: Start with taking out the older pennies 200 pennies - 30 pennies = 170 pennies. Take the 170 pennies * .20 = 34. 170 pennies - 34 pennies = 136 pennies. The answer is 136.
[Question]Tim buys a cabinet for $1200 and gets a 15% discount. How much did he pay?
[Answer]He got a discount of 1200 * .15 = $180. So he paid 1200 - 180 = $1020. The answer is 1020.
Q: Two old ladies spent the afternoon walking through Central Park. The first lady walked twice as far as the second lady. If the second lady walked four miles, what is the combined total distance, in miles, the two ladies walked?
A: The first lady walked 2 * 4 = 8 miles. In total, the two ladies walked 4 + 8 = 12 miles. The answer is 12.
Question: Hank gave his wife, Delphine, a box of 24 chocolates for Valentine's Day. On the first day, Delphine ate 4 chocolates. On the second day, she ate 3 less than twice as many chocolates as she ate the first day. On the third day, she ate two less than the number she ate on the first day. And on the fourth day, she ate one less than she ate the previous day. On the fifth day, how many chocolates remained uneaten?
Answer: Twice as many chocolates as she ate the first day is 2 * 4 = 8 chocolates. And three less than twice as many chocolates as she ate the first day is 8 - 3 = 5 chocolates. Two less than the number she ate on the first day is 4 - 2 = 2 chocolates. One less than she ate the third day is 2 - 1 = 1 chocolate. By the end of the fourth day, 4 + 5 + 2 + 1 = 12 chocolates had been eaten. Thus, on the fifth day, 24 - 12 = 12 chocolates remained uneaten. The answer is 12.
[Question]John's weight bench can support 1000 pounds. He wants to make sure to stay 20% under that weight for safety. If he weighs 250 pounds how much weight can he put on the bar?
[Answer]He wants to stay 1000 * .2 = 200 pounds under the max. So he wants to stay under 1000 - 200 = 800 pounds. That means he can put 800 - 250 = 550 pounds on the bar. The answer is 550.
[Question]Carson is refilling his tires. Each tire can hold 500 cubic inches of air. Two of the tires are completely flat and empty. One tire is 40% full and the last tire is 70% full. If Carson injects 50 cubic inches of air with each pump, how many pumps will it take him to fill all the tires?
[Answer]
First, if the a full tire needs 500 cubic inches of air, then two empty tires need: 500 cubic inches / tire * 2 tires = 1000 cubic inches. Accordingly, the 40% - full tire needs 500 cubic inches * (100% - 40%). So, we find the 40% - full tire needs 500 cubic inches * (60%) = 300 cubic inches. And, the 70% - full tire needs 500 cubic inches * (100% - 70%). So, the 70% - full tire needs 500 cubic inches * (30%) = 150 cubic inches. Now add up the needs of all the tires to find the total number of cubic inches needed: 1000 cubic inches + 300 cubic inches + 150 cubic inches = 1450 cubic inches. Finally, if the pumps each hold 50 cubic inches, the total number of pumps needed is 1550 cubic inches / 50 cubic inches / pump = 29 pumps. The answer is 29.