Question: Three schools organized a science fair competition and invited students from all the schools to develop ideas and present them before a panel of judges selected by all the schools competing in the science fair. There were 50 students from Know It All High School at the competition, 3/5 times as many students from Karen High as Know It All High School, and twice the combined number of students from the first two schools that came were from Novel Corona High School. Calculate the total number of students at the competition?
Answer: If 50 students came from Know It All High School, then Karen High, which had 3 / 5 times as many students as Know It All High School, had 3 / 5 * 50 = 30 students at the fair. The total number of students from Know It All and Karen high schools is 50 + 30 = 80 students. If Novel Corona had twice the combined number of students from Know It All and Karen high schools, then it had 2 * 80 = 160 students at the competition. The total number of students at the competition is 80 + 160 = 240. The answer is 240.

Question: Harold's fancy wrapping paper can wrap 5 shirt boxes or 3 XL boxes. For the upcoming holiday, he has 20 shirt boxes to wrap and 12 XL boxes to wrap. If each roll of wrapping paper costs $4.00 per roll, how much will he spend to wrap all of the boxes?
Answer: 1 roll can wrap 5 shirt boxes and he has 20 shirts boxes to wrap so he needs 20 / 5 = 4 rolls of wrap. 1 roll can wrap 3 XL boxes and he has 12 XL boxes to wrap so he needs 12 / 3 = 4 rolls or wrap. All total he needs 4 + 4 = 8 rolls of wrap. Each roll costs $4.00 and he needs 8 rolls so it will cost him 4 * 8 = $32.00 in wrapping paper. The answer is 32.

Question: Brady worked 6 hours every day in April. He worked 5 hours every day in June and 8 hours every day in September. What is the average amount of hours that Brady worked per month in those 3 months?
Answer: April = 6 * 30 = 180 hours. June = 5 * 30 = 150 hours. September = 8 * 30 = 240 hours. Total hours = 180 + 150 + 240 = 570 hours. 570 hours / 3 = 190 hours. He averaged working 190 hours per month. The answer is 190.

Question: Bingley has 5 bracelets. Kelly gives Bingley a fourth of her 16 bracelets. Then Bingley gives a third of his bracelets to his little sister. How many bracelets does Bingley have remaining?
Answer:
Kelly gives Bingley 16 / 4 = 4 bracelets. Bingley has 5 + 4 = 9 bracelets. Bingley gives his little sister 9 / 3 = 3 bracelets. In the end, Bingley has 9 - 3 = 6 bracelets remaining. The answer is 6.