At the start, there were 50 racers, who were joined by 30 more racers, thus 50 + 30 = 80 racers. After 30 more minutes, the number of racers doubled, totaling 80 * 2 = 160 racers. If the number of racers who finished is 130, the 160 - 130 = 30 racers dropped before finishing.
The answer: 30
Reverse engineering the question: There were 50 racers in a bicycle charity race at the beginning of the race. After 20 minutes, 30 more racers joined the race. The total number of racers doubled after another 30 minutes. If at the end of the race only 130 people finished the race, what's the total number of people who dropped before finishing the race?
Reasoning and answer: First find the number of schools Mandy applied to: 42 med schools / 3 = 14 med schools. Then divide that number by 2 to find the number of schools where she was accepted: 14 med schools / 2 = 7 med schools.
The answer: 7
What was the question?
Question: Mandy researched 42 med schools. She applied to 1/3 of the schools she researched and got into half of the schools where she applied. How many schools was Mandy accepted to?
First find the total number of clarinet and trumpet players: 6 players + 9 players = 15 players. Then find the total weight of the trumpets and clarinets: 15 players * 5 pounds / player = 75 pounds. Then find the total weight of the trombones: 8 players * 10 pounds / player = 80 pounds. Then find the total weight of the tubas: 3 players * 20 pounds / player = 60 pounds. Then find the total weight of the drummers: 2 drummers * 15 pounds / player = 30 pounds. Then add the weight of each type of instrument to find the total weight: 75 pounds + 80 pounds + 60 pounds + 30 pounds = 245 pounds.
The answer: 245
Reverse engineering the question: In the Oprah Winfrey High School marching band, each trumpet and clarinet player carries 5 pounds of weight, each trombone player carries 10 pounds of weight, each tuba player carries 20 pounds of weight, and each drum player carries 15 pounds of weight. If there are 6 trumpets, 9 clarinets, 8 trombones, 3 tubas, and 2 drummers, how much weight does the total marching band carry?
Reasoning and answer: Since there are 24 toys in the box, there are * 24 = 6 action figures. Because the rest of the toys are dolls, there are 24 - 6 = 18 dolls in the box.
The answer: 18
What was the question?
Question: There are 24 toys in the box and of them are action figures. The remaining toys are all dolls. How many dolls are there?
Roy has 2 x 2 = 4 black pens. Twice the number of black pens is 4 x 2 = 8. So, there are 8 - 2 = 6 red pens. Therefore, Roy has 2 + 6 + 4 = 12 pens in all.
The answer: 12
Reverse engineering the question: Roy has 2 blue pens. He has twice as many black and 2 less than twice as many red than black pens. How many pens does Roy have in all?
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: 6
Reverse engineering the 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?