Fern is checking IDs to get into an R-rated movie. She denied 20% of the 120 kids from Riverside High, 70% of the 90 kids from West Side High, and half the 50 kids from Mountaintop High. How many kids got into the movie?

First find how many kids from Riverside High are rejected: 20% * 120 kids =

<<20*.01*120=24>>24 kids Then find how many kids from West Side High are rejected: 70% * 90 kids = <<70*.01*90=63>>63 kids Then find how many kids from Mountaintop High are rejected: 50 kids / 2 = <<50/2=25>>25 kids Then add the number of kids from each school to find the total number of kids: 120 kids + 90 kids + 50 kids = <<120+90+50=260>>260 kids Then subtract all the kids who were rejected from the total number of kids to find the number who got in: 260 kids - 24 kids - 63 kids - 25 kids = <<260-24-63-25=148>>148 kids #### 148 Larry spends half an hour twice a day walking and playing with his dog. He also spends a fifth of an hour every day feeding his dog. How many minutes does Larry spend on his dog each day? Larry spends 30 * 2 = <<30*2=60>>60 minutes per day walking his dog. Larry spends 60 / 5 = <<60/5=12>>12 minutes every day feeding his dog. Larry spends 60 + 12 = <<60+12=72>>72 minutes per day on his dog. #### 72 A cleaning company produces two sanitizer sprays. One spray kills 50% of germs, and another spray kills 25% of germs. However, 5% of the germs they kill are the same ones. What percentage of germs would be left after using both sanitizer sprays together? After the first spray kills 50% of germs, there will be 100 - 50 = <<100-50=50>>50% left. The second spray kills 25%, but 5% have already been killed by the 50% spray, so it kills 25 - 5 = <<25-5=20>>20%. After the second spray kills 20% of the remaining germs, there will be 50 - 20 = <<50-20=30>>30% left. #### 30 Toby is counting goldfish in the local pond. He knows that only 25% of goldfish are at the surface and the rest are too deep below the surface to be able to see. If he counts 15 goldfish, how many are below the surface? There are 60 goldfish because 15 / .25 = <<15/.25=60>>60 75% of the fish are below the surface because 100 - 25 = <<100-25=75>>75 There are 45 goldfish below the surface because 60 x .75 = <<60*.75=45>>45 #### 45 The owner of a Turkish restaurant wanted to prepare traditional dishes for an upcoming celebration. She ordered ground beef, in four-pound packages, from three different butchers. The following morning, the first butcher delivered 10 packages. A couple of hours later, 7 packages arrived from the second butcher. Finally, the third butcher’s delivery arrived at dusk. If all the ground beef delivered by the three butchers weighed 100 pounds, how many packages did the third butcher deliver? Since each package weighed 4 pounds, the first butcher delivered 10 * 4 = <<10*4=40>>40 pounds The second butcher's delivery was 7 * 4 = <<7*4=28>>28 pounds The first two butchers therefore delivered 40 + 28 = <<40+28=68>>68 pounds Subtracting that weight from the total weight of ground beef gives 100 - 68 = <<100-68=32>>32 pounds It therefore means the third butcher delivered 32/4 = <<32/4=8>>8 packages. #### 8 James watched 2 episodes of Jeopardy and 2 episodes of Wheel of Fortune. Jeopardy is 20 minutes and Wheel of Fortune is twice as long. How many hours did he watch TV? He watched 2*20=<<2*20=40>>40 minutes of Jeopardy. Wheel of Fortune is 2*20=<<2*20=40>>40 minutes each. So he watched it for 40*2=<<40*2=80>>80 minutes. So he watched 40+80=<<40+80=120>>120 minutes of TV. That means he watched 120/60=<<120/60=2>>2 hours of TV. #### 2 Richard can clean his room in 22 minutes. Cory takes 3 minutes more than Richard to clean her room while Blake can clean his room 4 minutes more quickly than Cory. If they have to clean their rooms twice a week, how many minutes do all three spend cleaning their rooms each week? Cory takes 22 + 3 = <<22+3=25>>25 minutes to clean her room. Blake takes 25 - 4 = <<25-4=21>>21 minutes to clean his room. The three of them can clean their room in 22 + 25 + 21 = <<22+25+21=68>>68 minutes in all. In a week, they spend 68 x 2 = <<68*2=136>>136 minutes cleaning their rooms. #### 136 Mary has 5 green crayons and 8 blue crayons of different shades. If she gives out 3 green crayons and 1 blue crayon to Becky, how many crayons does she have left? She had 5+8 = <<5+8=13>>13 crayons to start with She gave out 3+1 = <<3+1=4>>4 crayons to Becky She will have 13-4 = <<13-4=9>>9 crayons left #### 9 Winwin won $50 in a lottery. She paid 20% for the tax and she paid $5 for the processing fee. How much was she able to take home? Winwin paid $50 x 20/100 = $<<50*20/100=10>>10 for the tax. So, she has $50 - $10 = <<50-10=40>>40 after paying the tax. Therefore, Winwin was able to take home $40 - $5 = $<<40-5=35>>35 after she paid for the processing fee. #### 35 In 3 years, Jayden will be half of Ernesto's age. If Ernesto is 11 years old, how many years old is Jayden now? Ernesto = 11 + 3 = <<11+3=14>>14 Jayden = 14/2 = <<14/2=7>>7 in 3 years Now = 7 - 3 = <<7-3=4>>4 Jayden is 4 years old. #### 4