There are 350 trees in the park, 70% of which are pine trees. How many are not pine trees?

How many pine trees are there? ** There are 350 x 70/100 =

<<350*70/100=245>>245 pine trees. How many trees are not pine trees? ** Therefore, 350 - 245 = <<350-245=105>>105 trees are not pine trees. #### 105 Andrew holds a bake sale to fundraise for charity. The bake sale earns a total of $400. Andrew keeps $100 to cover the cost of ingredients. He donates half of the remaining total to the local homeless shelter, and the other half to the local food bank. Andrew also decides to donate $10 from his own piggy bank to the local homeless shelter. How much money in total does Andrew donate to the homeless shelter? How much money does Andrew have after paying off the cost of ingredients? ** After paying off the cost of ingredients, Andrew has $400 - $100 = $<<400-100=300>>300 How much money does the homeless shelter receive? ** Since half of the money goes to the homeless shelter, the shelter receives $300 / 2 = $<<300/2=150>>150 How much money does Andrew donate to the homeless shelter? ** After contributing some of his own money, Andrew donates $150 + $10 = $<<150+10=160>>160 to the shelter. #### 160 Alan went to the market and bought 20 eggs at the price of $2 per egg. He bought 6 chickens for the price of $8 per chicken. How much money did Alan spend at the market? How much did Alan spend on eggs? ** The cost of 20 eggs is 20 * $2 = $<<20*2=40>>40. How much did Alan spend on chickens? ** The cost of 6 chickens is 6 * $8 = $<<6*8=48>>48. How much money did Alan spend at the market? ** The total amount Alan spent at the market is $40 + $48 = $<<40+48=88>>88. #### 88 At a station, a train comes every 5 minutes leaving 200 passengers and taking 320 others. How many different passengers step on and off a train at the station within an hour? How many different people are there at every passenger exchange? ** At every passenger exchange there are 200 + 320 = <<200+320=520>>520 different people. How many times does a train come in an hour? ** One hour is 60 minutes, so during one hour, a train comes 60 minutes/hour / 5 minutes/train = <<60/5=12>>12 times. How many different passengers step on and off a train at the station within an hour? ** So during one hour, 12 trains * 520 passengers/train = <<12*520=6240>>6240 different passengers step on and off the train. #### 6240 Greg bought a 20-pack of granola bars to eat at lunch for the week. He set aside one for each day of the week, traded three of the remaining bars to his friend Pete for a soda, and gave the rest to his two sisters. How many did each sister get when they split them evenly? How many bars did Greg keep? ** Greg kept 1 granola bar for each of the 7 days of the week, so there were 20 - 7 = <<20-7=13>>13 bars left. How many bars did Greg trade? ** He traded 3 to his friend Pete, so there were 13 - 3 = 10 bars left. How many bars did each sister get when they split them evenly? ** His 2 sisters split the rest evenly, so each got 10 / 2 = <<10/2=5>>5 granola bars. #### 5 Alex is stacking his books in a pyramid. Each level of the pyramid has 80% as many books as the number of books in the previous level. If he makes four levels and the top level has 64 books, how many books are in the pyramid in total? How many books are in the third level? ** The third level has 80 books because 64 / .8 = <<64/.8=80>>80 How many books are in the second level? ** The second level has 100 books because 80 / .8 = <<80/.8=100>>100 How many books are in the first level? ** The first level has 125 books because 100 / .8 = <<100/.8=125>>125 How many books are in the pyramid in total? ** In total there are 369 books because 64 + 80 + 100 + 125 = <<64+80+100+125=369>>369 #### 369 There are one hundred tickets to be sold for a volleyball game. Andrea sold twice as many tickets as Jude while Sandra sold 4 more than half the number of tickets Jude sold. If Jude sold 16 tickets, how many tickets need to be sold? How many tickets did Andrea sell? ** Andrea sold 16 x 2 = <<16*2=32>>32 tickets. How many tickets did Sandra sell? ** Half the number of tickets Jude sold is 16/2 = <<16/2=8>>8. How many tickets did Sandra sell? ** So, Sandra sold 8 + 4 = <<8+4=12>>12 tickets. How many tickets did Andrea, Jude, and Sandra sell? ** Thus, Andrea, Jude, and Sandra sold a total of 32 + 16 + 12 = <<32+16+12=60>>60 tickets. How many tickets need to be sold? ** Therefore, 100 - 60 = <<100-60=40>>40 tickets need to be sold. #### 40 Leah bought 3 boxes of birdseed. When she went to put them away, she discovered that she already had 5 boxes in the pantry. Her parrot eats 100 grams of seeds each week and her cockatiel eats 50 grams of seeds in a week. If each box of birdseed contains 225 grams, for how many weeks can she feed her birds without going back to the store? How many grams of seed do her birds eat in a week? ** In a week, her birds eat a total of 100 grams + 50 grams = <<100+50=150>>150 grams of seed each week. How many boxes of birdseed does Leah have? ** Leah has a total of 3 + 5 = <<3+5=8>>8 boxes of birdseed. How many grams of seed are in the boxes of birdseed? ** The boxes of birdseed contain a total of 8 * 225 grams = <<8*225=1800>>1800 grams. How many weeks can she feed her birds without going back to the store? ** This is enough birdseed to feed her pets for 1800 / 150 = <<1800/150=12>>12 weeks. #### 12 Adam and Tom are brothers. Adam is 8 years old and Tom is 12 years old. In how many years will their combined age be 44 years old? How old are the two brothers now? ** At present, the two brothers have a combined age of 8 + 12 = <<8+12=20>>20 years old. How many years does one year represent? ** Therefore, 1 year means an increase in the sum of their ages by 1 * 2 = <<1*2=2>>2 years. How many more years do Adam and Tom need? ** Adam and Tom need a total of 44 - 20 = <<44-20=24>>24 more years to be 44 years old together. How many years will it take for Adam and Tom to be 44 years old together? ** So both brothers will be 44 years old together after 24 / 2 = <<24/2=12>>12 years. #### 12 Antoine is having a dinner party and his butcher recommends 1/2 pound of meat per person. If he's inviting 6 people over and the beef tenderloin is $15.00 a pound, how much will this cost him? How many pounds of meat does Antoine need? ** He's inviting 6 people over and needs 1/2 pound of meat for each so that's 6*.5 = <<6*.5=3>>3 pounds of meat How much will the beef tenderloin cost him? ** The beef tenderloin is $15.00 a pound and he needs 3 pounds so that's 15*3 = $<<15*3=45.00>>45.00 for dinner #### 45