Peter needs to buy birdseed to last a week. He knows that each parakeet eats 2 grams a day. His parrots eat 14 grams a day. His finches eat half of what a parakeet eats. If he has 3 parakeets, 2 parrots and 4 finches, how many grams of birdseed does he need to buy?

How many grams do the parakeets eat? ** His parakeets eat 6 grams a day, because three parakeets times two grams each equals 6 grams.

How many grams do the parrots eat? ** His parrots will eat 28 grams a day because two parrots times 14 grams equals

<<2*14=28>>28 grams. How many grams do the finches eat? ** Each finch will eat 1 gram a day, because they eat half of what a parakeet does and 1/2 of 2 equals one. How many grams do the finches eat? ** His finches will eat 4 grams a day because four finches times 1 gram equals 4 grams. How many grams do his birds eat? ** His birds eat 38 grams a day because 6 plus 28 plus 4 equals <<6+28+4=38>>38 How many days are in a week? ** Each week has 7 days How many grams does he need in a week? ** Therefore, in a week he will need 266 grams because 7 times 38 equals <<7*38=266>>266. #### 266 Mr. Zubir bought a pair of pants, a shirt, and a coat. The pair of pants and shirt costs $100. The pants and coat cost $244. The coat costs 5 times as much as the shirt. How much did Mr. Zubir pay for his coat? How much did the pants and shirt cost? ** Let X be the coat's price. The shirt's price is X/5. The pants and the shirt cost $100, so the pants price is $100 - X/5. How much did the pants and coat cost? ** The pants and coat costs ($100 - X/5) + X = $244. How much did the pants and coat cost? ** Combining like terms and subtracting $100 from both sides, we get 4/5*X = $144. How much did the coat cost? ** Dividing both sides by 4/5, we get X = $180. #### 180 Isaac cut his 30 meters ribbon into 6 equal parts. He then used 4 parts of the ribbon. How many meters of ribbon are not used? How many meters is each part? ** Each part is 30/6 = <<30/6=5>>5 meters long. How many meters of ribbon did Liam use? ** Since Liam used 4 parts, then he used 5 x 4 = <<4*5=20>>20 meters of the ribbon. How many meters of ribbon are not used? ** So, 30 - 20 = <<30-20=10>>10 meters of ribbon is not used. #### 10 Percy wants to save up for a new PlayStation, which costs $500. He gets $200 on his birthday and $150 at Christmas. To make the rest of the money, he's going to sell his old PlayStation games for $7.5 each. How many games does he need to sell to reach his goal? How much money does Percy need to make? ** He needs to earn $150 more dollars because 500 - 200 - 150 = <<500-200-150=150>>150 How many games does Percy need to sell? ** He needs to sell 20 games because 150 / 7.5 = <<150/7.5=20>>20 #### 20 Jason spent 1/4 of his money and an additional $10 on some books. He then spent 2/5 of the remaining money and an additional $8 on some DVDs. If he was left with $130, how much money did he have at first? Define a variable ** Let X be the money Jason had at first. How much money did Jason spend on books? ** Jason spent 1/4*X + 10 on books. How much money did Jason spend on DVDs? ** Jason spent 2/5*[X - (1/4*X + 10)] + 8 on some DVDs. Write an equation ** Jason has X - (1/4*X + 10) - {2/5*[X - (1/4*X + 10)] + 8} = $130 left. Simplify ** X - 1/4*X - 10 - 2/5*X + 1/10*X + 4 - 8 = $130. Simplify ** 9/20*X - 14 = $130. Simplify ** X = $<<320=320>>320. #### 320 Kiki made 10 cucumber sandwiches and 8 egg sandwiches for the tea party. Each cucumber sandwich was cut into 4 triangles. Each egg sandwich was cut into 2 rectangles. If her guests ate 28 triangles and 12 rectangles, how many slices of bread did they eat? How many cucumber sandwiches did the guests eat? ** The guests ate 28 / 4 = <<28/4=7>>7 cucumber sandwiches. How many egg sandwiches did the guests eat? ** The guests ate 12 / 2 = <<12/2=6>>6 egg sandwiches. How many sandwiches did the guests eat? ** They ate a total of 7 + 6 = <<7+6=13>>13 sandwiches. How many slices of bread did the guests eat? ** They ate a total of 13 x 2 = <<13*2=26>>26 slices of bread. #### 26 Carolyn counts 6 monkeys and 6 birds in the tree outside her window. Then two of the monkeys each eat one bird. What percent of the animals outside her window are monkeys now? How many birds are there now? ** First find the new number of birds: 6 birds - 2 birds = <<6-2=4>>4 birds How many animals are there now? ** Then find the new total number of animals: 6 monkeys + 4 birds = <<6+4=10>>10 animals How many monkeys are there now? ** Then divide the number of monkeys by the number of animals and multiply by 100% to express the answer as a percentage: 6 monkeys / 10 animals * 100% = 60% #### 60 Every day, Billie bakes 3 pumpkin pies for 11 days and puts them in the refrigerator. It takes 2 cans of whipped cream to cover 1 pie. If Tiffany comes over and eats 4 pies, how many cans of whipped cream does Billie need to buy to cover the remaining pies? How many pies does Billie bake in total? ** In total Billie bakes 3 x 11 = <<3*11=33>>33 pies. How many pies are left after Tiffany eats the pies? ** After Tiffany eats the pies, this many pies are in the refrigerator: 33 - 4 = <<33-4=29>>29 pies. How many cans of whipped cream does Billie need to buy to cover the remaining pies? ** She needs to buy this many cans of whipped cream 29 x 2 = <<29*2=58>>58 cans. #### 58 A chocolate box contains 200 bars. Thomas and his 4 friends take 1/4 of the bars and decide to divide them equally between them. One of Thomas's friends doesn't like chocolate bars very much and returns 5 of his bars to the box. Later, his sister Piper comes home and takes 5 fewer bars than those taken in total by Thomas and his friends so she can also share with her friends. What's the total number of bars left in the box? How many bars did Thomas and his friends take? ** Thomas and his friends took 1/4*200 = <<1/4*200=50>>50 bars. How many bars were left in the box? ** The total number of bars left in the box was 200-50 = <<200-50=150>>150 bars. How many bars did each of them get? ** Since there are five of them sharing, each of them got 50/5 = <<50/5=10>>10 bars. How many bars were left in the box after a friend returned 5 bars? ** After a friend returned 5 bars, there were 150 + 5 = <<150+5=155>>155 bars in the box. How many bars did Piper take? ** Piper took five fewer bars, that is 50 - 5 = <<50-5=45>>45 bars. What is the total number of bars left in the box? ** The total remaining bars left in the box is 155 - 45 = <<155-45=110>>110 bars. #### 110 Kendra baked cookies for her family. Each batch contains 12 cookies. His family has 4 total people. She made three batches. Each cookie contains 2 chocolate chips. How many chips does each family member eat if they all get the same number of cookies? How many cookies did Kendra make? ** She made 36 cookies because 12 x 3 = <<12*3=36>>36 How many chips are in each cookie? ** These contain 72 chocolate chips because 36 x 2 = <<36*2=72>>72 How many chips does each family member eat if they all get the same number of cookies? ** They each get to eat 18 chocolate chips because 72 / 4 = <<72/4=18>>18 #### 18