Question: Andy can get 50 demerits in a month before getting fired. If he got 2 demerits per instance for showing up late 6 times and 15 demerits for making an inappropriate joke, how many more demerits can he get this month before getting fired?
Answer: Step-by-step reasoning process: First find how many demerits Andy got for showing up late: 2 demerits / time * 6 times = 12 demerits. Then subtract the number of demerits he's gotten so far to find how many more he can get before getting fired: 50 demerits - 12 demerits - 15 demerits = 23 demerits.
So the answer is 23.

Question: Philip has a farm with animals. He has 20 cows, 50% more ducks. Philip also has as many pigs as one-fifth of ducks and cows in total. How many animals does Philip have on his farm?
Answer: Step-by-step reasoning process: Philip has 50 / 100 * 20 = 10 more ducks than cows. Which means he has 20 + 10 = 30 ducks. So Philip's cows and ducks sum up to 20 + 30 = 50 animals. If there are 50 cows and ducks, that means Philip has 1 / 5 * 50 = 10 pigs. In total Philip has 50 + 10 = 60 animals on his farm.
So the answer is 60.

Question: Mark hires a singer for 3 hours at $15 an hour. He then tips the singer 20%. How much did he pay?
Answer: Step-by-step reasoning process: The cost was 15 * 3 = $45. So the tip was 45 * .2 = $9. So in total, he paid 45 + 9 = $54.
So the answer is 54.

Question: There were students from three different schools taking part in a debate organized by the town's mayor on a stage. The first school had twice as many students as the second school, and the second school had 40 more students than the third school. If the third school had 200 students, and after the debate was over, every student shook the mayor's hand, calculate the total number of students who shook the mayor's hand on the stage.
Answer:
Step-by-step reasoning process: If the third school had 200 students, and the second school had 40 more students than the third school, the second school had 200 + 40 = 240 students. The third and second schools had 240 + 200 = 440 students on stage taking part in the debate. Since the first school had twice as many students as the second school, and the second school had 240 students, the first school had 240 * 2 = 480 students on stage taking part in the debate. If after the debate was over, every student at the stage shook the mayor's hand, the number of students who shook the mayor's hand is 480 + 440 = 920 students.
So the answer is 920.