Q: Seven parrots and some crows are perched on a tree branch. There was a noise and the same number of parrots and crows flew away. If only 2 parrots and 1 crow are left on the tree branch now, how many birds were perched on the branch to begin with?
A: The number of parrots that flew away after the noise is 7 - 2 = 5. The same number of crows (5) flew away leaving 1 crow so there were 5 + 1 = 6 crows to begin with. The total number of crows and parrots was 7 + 6 = 13. The answer is 13.
Question: In a court-mandated traffic class, there are a certain number of drunk drivers and 3 less than 7 times that many speeders. If there are 45 students total, how many drunk drivers are there?
Answer: Let d be the number of drunk drivers and s be the number of speeders. We know that d + s = 45 and s = 7d - 3. Substituting the second equation into the first equation, we get d + 7d - 3 = 45. Combining like terms, we get 8d - 3 = 45. Adding 4 to both sides, we get 8d = 48. Dividing both sides by 8, we get d = 6. The answer is 6.
[Question]The new pad of paper has 120 pages. Sammy uses 25% of the pages for his science project, and another 10 pages for his math homework. How many pages remain in the pad?
[Answer]He used 0.25 * 120 = 30 on science. There were 120 - 30 = 90 pages left. And then he has 90 - 10 = 80 after math. The answer is 80.
Q: The snack machine at Richmond High School sells candy bars for $2 each and chips for $.50 each. How much money, in dollars, will 5 students need in total if each of them gets 1 candy bar and 2 bags of chips?
A: The students buy 2 * 5 = 10 bags of chips. 10 bags of chips cost 10 * 0.5 = 5 dollars. 5 candy bars cost 5 * 2 = 10 dollars. They will need 10 + 5 = 15 dollars. The answer is 15.
Question: Beth has 72 marbles of three colors. Each color has the same amount of marbles. If Beth loses 5 red, twice as many blue, and three times as many yellow ones than red ones, how many marbles does she have left?
Answer: Beth has 72 / 3 = 24 marbles of each color. Beth has 24 - 5 = 19 red ones left. Beth lost 5 * 2 = 10 blue ones. Beth has 24 - 10 = 14 blue ones left. Beth lost 5 * 3 = 15 yellow ones. Beth has 24 - 15 = 9 yellow ones left. She has a total of 19 + 14 + 9 = 42 marbles left. The answer is 42.
Q: Tom, Tim, and Paul are collecting photos of cars. Paul has 10 photos more than Tim. Tim has one hundred photos less than the total amount of photos which is 152. How many photos does Tom have?
A:
Tim has 152 photos - 100 photos = 52 photos. When Tim has 52 photos, then Paul has 52 + 10 photos = 62 photos. Tim and Paul have together 52 photos + 62 photos = 114 photos. That leaves Tom with 152 photos - 114 photos = 38 photos. The answer is 38.