Question: Roberto is raising chickens for eggs. He buys 4 chickens for $20 each. They cost $1 in total a week to feed and each produces 3 eggs a week that will last forever. He used to buy 1 dozen eggs a week and spent $2 per dozen. After how many weeks will the chickens be cheaper than buying his eggs?
Answer: Step-by-step reasoning process: The chickens cost $80 because 4 x 20 = 80. His chickens produce a dozen eggs a week because 4 x 3 = 12. Each week that he has chickens is $1 cheaper than buying eggs because 2 - 1 = 1. After 80 weeks his chickens will be paid off because 80 / 1 = 80. After 81 weeks the chickens will be cheaper than buying eggs because 80 + 1 = 81.
So the answer is 81.

Question: Jamir and his two friends Sarah and Julien, go to their school's swimming pool to swim. Jamir swims 20 more meters per day than Sarah, who swims twice the distance Julien swims. They go to the swimming pool the whole week, swimming the same distances as before. If Julien swam 50 meters, what's the combined distance for three of them for the whole week?
Answer: Step-by-step reasoning process: If Julien swam for the whole week, then the total distance in meters that he covered is 50 * 7 = 350 meters. Sarah swam twice the distance covered by Julien, which is 2 * 50 = 100 meters. Sarah's total for the whole week is 100 * 7 = 700 meters. If Jamir swam 20 meters more than Sarah, he covered 100 + 20 = 120 meters. Jamir's total for the whole week is 120 * 7 = 840 meters. The combined distance for all of them is 840 + 700 + 350 = 1890 meters.
So the answer is 1890.

Question: Paul went to the sporting goods store to buy a tennis racket. His favorite brand was having a sale that offered customers a deal to buy one racket at full price and get the second racket for half off the full price. If he purchased two rackets that were each originally marked at a full price of $60, how much did he spend on the two rackets, in dollars?
Answer: Step-by-step reasoning process: Half off the full price of $60 is $60 / 2 = $30 off. Thus, for the two rackets, Paul spends $60 + $60 - $30 = $90.
So the answer is 90.

Question: Zach baked cookies for a bake sale. On Monday he baked 32 cookies. On Tuesday he ran out of sugar and could only bake half of the number of cookies he baked the day before. On Wednesday he baked three times the number of cookies he did on Tuesday, but his brother ate 4 of those cookies. How many cookies did he have at the end of the three days?
Answer:
Step-by-step reasoning process: On Tuesday he made 32 / 2 = 16 cookies. On Wednesday he made 16 * 3 = 48 cookies. Before his brother ate some he had 32 + 16 + 48 = 96 cookies. After his brother ate some he had 96 - 4 = 92 cookies.
So the answer is 92.