Q: Candace is trying to decide whether to wear her old shoes or new high-tech shoes for a hike. The high-tech shoes will help Candace walk twice as fast, but they're not broken in yet, so she'll get 1 blister after every 2 hours she spends walking in them. Each blister slows Candance down by 2 miles per hour. If Candance walks 6 miles per hour in the old shoes and plans to hike for 4 hours, how many miles per hour can she go in the new shoes?
A: Wearing the high - tech shoes, Candace can hike 6 mph * 2 = 12 mph for the first two hours. Then she gets one blister, so her speed drops to 12 mph - 2 mph = 10 mph for the next two hours of the hike. After that time Candace gets another blister, but 2 hours + 2 hours = 4 hours, so the hike is over and we don't care about her speed anymore. Candace spends an equal amount of time walking at 12 mph and 10 mph, so we can average the two speeds to find an overall speed of (12 mph + 10 mph) / 2 = 11 mph. The answer is 11.
Question: Ronald and his friend Max want to buy a new video game that was just released. The game costs $60. To earn money, they started selling ice cream in their yard, and they sell each ice cream for $5. How many ice creams will they need to sell for both to be able to afford to buy the game?
Answer: They need $60 / game x 2 games = $120 in total. If one ice cream is sold for $5, they will need to sell $120 ÷ $5 / ice cream = 24 ice creams. The answer is 24.
[Question]Tamara, Nora, and Lulu have been saving to pay off a $40 debt. So far, Nora has saved five times what Lulu has, but three times Tamara’s savings. Lulu has saved $6. If they pay off the debt and divide the remaining money equally, how many dollars will each girl get?
[Answer]Nora has saved 5 * 6 = 30 dollars. This means that Tamara has saved 30 / 3 = 10 dollars. All together, they have saved 30 + 10 + 6 = 46 dollars. If they pay off the debt they will remain with 46 - 40 = 6 dollars. Dividing the remaining money equally will give each girl 6 / 3 = 2 dollars. The answer is 2.
Q: Central Park had 8 more than half of the number of trash cans as in Veteran's Park. Then one night, someone took half of the trash cans from Central Park and put them in Veteran's Park. If originally there were 24 trash cans in Veteran's Park, how many trash cans are now in Veteran's Park?
A: Half the original number of trash cans in Veteran's Park is 24 / 2 = 12 trash cans. Thus Central Park originally had 8 more than half the number of trash cans as what was originally in Veteran's Park, or 12 + 8 = 20 trash cans. Half of the trash cans from Central Park is 20 / 2 = 10 trash cans. After the addition of the 10 new cans, there are now 24 + 10 = 34 trash cans in Veteran's Park. The answer is 34.
Question: There are 45 children in a classroom. One-third of them are girls. How many boys are in the classroom?
Answer: One - third of all the kids are girls, which means 1 / 3 * 45 = 15 children. So there are 45 - 15 = 30 boys in the classroom. The answer is 30.
Q: John uses a 75-watt electric fan for 8 hours a day. How much kWh of electric energy does he consume per month (30 days) for using the electric fan?
A:
In a day, John uses 75x 8 = 600 watts. So in a month, he uses 600 x 30 = 18 000 watts. Since there are 1000 watts in 1 kilowatt, then John uses 18000 / 1000 = 18. The answer is 18.