Selena reads a book with 400 pages. Harry reads a book with 20 fewer than half the number of pages Selena's book has. How many pages are in the book of Harry?

Half the number of pages of Selena is 400/2 =

<<400/2=200>>200. Therefore, Harry's book has 200 - 20 = <<200-20=180>>180 pages. #### 180 Melody has three dogs. Each dog eats 1/2 of a pound of dog food twice a day. If Melody bought 30 pounds of dog food, how many pounds of dog food are left after a week? Each dog eats 1/2 x 2 = <<1/2*2=1>>1 pound of dog food each day. So the three dogs eat a total of 1 x 3 = <<1*3=3>>3 pounds each day. That is 3 x 7 = <<3*7=21>>21 pounds in a week. Therefore, 30 - 21 = <<30-21=9>>9 pounds of food are left after a week. #### 9 For her gift present, Lisa has saved $1200. She asks her mother, as well as her brother, to help her raise the total amount of money she needs to buy the gift.,If her mother gave her 3/5 times of what she had saved and her brother gave her twice the amount her mother gave her, calculate the price of the gift she wanted to buy if she still had $400 less. Lisa's mother gave her 3/5*$1200 = $<<3/5*1200=720>>720 for her birthday gift. She also received 2*$720 = $<<2*720=1440>>1440 from her brother for the gift. If she still had to find $400 to fully reach her birthday gift cost, it means her gift's total cost was $1200+$1440+$720+$400 = $<<1200+1440+720+400=3760>>3760 #### 3760 Christian is twice as old as Brian. In eight more years, Brian will be 40 years old. How old will Christian be in eight years? If in eight years Brian will be 40 years old, he is currently 40-8 = <<40-8=32>>32 years old. Since Christian is twice as old as Brian, he is 2*32 = <<2*32=64>>64 years old. In 8 years, Christian will be 64+8 = <<64+8=72>>72 years old. #### 72 Tyler weighs 25 pounds more than Sam. Peter weighs half as much as Tyler. If Peter weighs 65 pounds, how much does Sam weigh, in pounds? Tyler weighs 65*2=<<65*2=130>>130 pounds. Sam weighs 130-25=<<130-25=105>>105 pounds. #### 105 Samir just turned half the age Hania was 10 years ago. If in five years Hania will be 45 years old, what will Samir's age be five years from now? If in five years, Hania will be 45 years old, currently she is 45-5 = <<45-5=40>>40 years old. Ten years ago, Hania was 40-10 = <<40-10=30>>30 years old. Samir just turned half the age Hania was 10 years ago, which means she is 30/2 = <<30/2=15>>15 years old. In five years, Samir will be 15+5 = <<15+5=20>>20 years old #### 20 Mary brought 50 stickers to class. She gave 4 stickers to each of her 5 friends. She gave everyone else in class two stickers each. If she has 8 stickers left over, how many students are in the class, including Mary? She gave out 50 - 8 = <<50-8=42>>42 stickers in total. She gave 4 * 5 = <<4*5=20>>20 stickers to her friends. She gave out 42 - 20 = <<42-20=22>>22 stickers to the rest of the class. This means there are 22 / 2 = <<22/2=11>>11 other students in the class. There are a total of 1 + 5 + 11 = <<1+5+11=17>>17 students in the class. #### 17 Zach was a waiter in a fancy restaurant. His last table for the night was a party for 4 people. The mom ordered lobster for $25.50, the dad ordered steak for $35.00 their twin boys both ordered a cheeseburger and fries for $13.50 each. They started their meal with an appetizer that cost 8.50. Everyone also ordered a dessert that cost $6.00 each. They wanted to give a 20% tip for Zach on the bill. What did the final bill total come to? The twins ordered a cheeseburger each so 2*13.50 = $<<2*13.50=27.00>>27.00 for both cheeseburgers Everyone ordered a dessert so 4*6 = $<<4*6=24.00>>24.00 for dessert When you add all the meals together they spent 25.50+35.00+27.00+8.50+24.00 = $<<25.50+35.00+27.00+8.50+24.00=120.00>>120.00 Zach's tip was 20% so .20*120.00 = $<<20*.01*120=24.00>>24.00 When you add up the meals $120.00 and Zach's tip of $24.00 then the total cost is 120.00 + 24.00 = $<<120+24.00=144.00>>144.00 #### 144 It takes a dog groomer 10 minutes to dry a short-haired dog like a beagle. It takes him twice as long to dry a full-haired, fluffy dog like a german shepherd. One morning, he has 6 short-haired dogs to dry and 9 full-haired dogs to dry. How many hours does it take him to dry all of the dogs? It takes 10 minutes to dry the coat of a short-haired dog and twice as long for a full haired dog so they take 10*2 = <<10*2=20>>20 minutes to dry He had 6 short hair dogs and they took 10 minutes to dry each so they took 6*10= <<6*10=60>>60 minutes to dry He had 9 full haired dogs that took 20 minutes to dry each so they took 9*20 = <<9*20=180>>180 minutes to dry Together is takes him 60+180 = <<60+180=240>>240 minutes to dry all of the dogs 60 minutes are in 1 hour and he spends 240 minutes on the dogs so he worked for 240/60 = <<240/60=4>>4 hours drying the dogs #### 4 Mr. Mayer bought Corgi dogs for $1000 each. He plans to sell them with a 30% profit. If one of his friends wants to buy two dogs, how much should his friend pay? Mr. Mayer wants to get a $1000 x 30/100 = $<<1000*30/100=300>>300 profit. So, he will sell each Corgi dog for $1000 + $300 = $<<1000+300=1300>>1300. Hence, his friend should pay $1300 x 2 = $<<1300*2=2600>>2600. #### 2600