If Jenna has twice as much money in her bank account as Phil does, and Phil has one-third the amount of money that Bob has in his account, and Bob has $60 in his account, how much less money does Jenna have in her account than Bob?

If Phil has one-third of the amount that Bob does, that means he has $60/3= $

<<60/3=20>>20 in his account. Since Jenna has twice as much money as Phil, that means she has $20*2= <<20*2=40>>40 in her account. Since Bob has $60 in his account, that means he has $60-$40=$<<60-40=20>>20 more than Jenna. #### 20 Libby has 160 quarters in her piggy bank. She has to pay $35 to replace her sister’s dress that she borrowed and ruined. After replacing the dress, how many quarters will Libby have left? There are 4 quarters in every dollar, so $35 x 4 = <<35*4=140>>140 quarters. Libby has 160 quarters – 140 quarters to repay her sister = <<160-140=20>>20 quarters left. #### 20 A town has ten neighborhoods, each having four roads passing through them. Each of the roads has 250 street lights on each opposite side. Calculate the total number of street lights on all the roads of the neighborhoods in the town. If Each of the roads has 250 street lights on each opposite side, the total number of street lights on one road is 250*2 = <<250*2=500>>500 Since each neighborhood has four roads passing through it, the total number of street lights in one neighborhood is 500*4 = <<500*4=2000>>2000 street lights. The town has ten neighborhoods, and since each neighborhood has 2000 street lights on all its roads, there are 2000*10 = <<2000*10=20000>>20000 street lights in the town. #### 20000 Hallie is an artist. She wins an art contest, and she receives a $150 prize. She sells 3 of her paintings for $50 each. How much money does she make in total from her art? The money she earns from selling paintings is 3 * $50 = $<<3*50=150>>150 The total money she makes from her art is $150 + $150 = $<<150+150=300>>300 #### 300 Dan's skateboarding helmet has ten more craters than Daniel's ski helmet. Rin's snorkel helmet has 15 more craters than Dan's and Daniel's helmets combined. If Rin's helmet has 75 craters, how many craters are in Dan's helmet? If Rin's snorkel helmet has 75 craters, then Dan's and Daniel's helmets combined have 75-15 = <<75-15=60>>60 craters. Let's assume Dan's helmet has C craters. Since Dan's skateboarding helmet has ten more craters than Daniel's ski helmet, the total number of craters their helmets have is C+(C-10)=60 2C=60+10 The total number of craters that Dan's helmet has is C=70/2 Dan's skateboarding helmet has 35 craters. #### 35 Xavier is twice as old as Yasmin is. Xavier will 30 years old in six years. What is the total of their ages now? If in six years Xavier will be 30 years old, he is 30-6 = <<30-6=24>>24 years old now. If Xavier is twice as old as Yasmin, Yasmin is 24/2 = <<24/2=12>>12 years old. The total of their ages now is 12+24 = <<12+24=36>>36 years #### 36 One logger can cut down 6 trees per day. The forest is a rectangle measuring 4 miles by 6 miles, and each square mile has 600 trees. If there are 30 days in each month, how many months will it take 8 loggers to cut down all the trees? First find the total area of the forest: 4 miles * 6 miles = <<4*6=24>>24 square miles Then find the total number of trees in that area: 600 trees/square mile * 24 square miles = <<600*24=14400>>14400 trees Then find the number of trees all the loggers can cut down in one day: 8 loggers * 6 trees/logger = <<8*6=48>>48 trees Then divide the total number of trees by the number cut down per day to find the number of days it takes to clear the forest: 14400 trees / 48 trees/day = <<14400/48=300>>300 days Then divide the time in days by the number of days per month to find the time in months: 300 days / 30 days/month = <<300/30=10>>10 months #### 10 Max can trade 3 coconuts for a crab and 6 crabs for a goat. If he has 342 coconuts and he wants to convert all of them into goats, how many goats will he have? First find the number of crabs Max can get by dividing the number of coconuts by the exchange rate with crabs: 342 coconuts / 3 coconuts/crab = <<342/3=114>>114 crabs Then divide the number of crabs by the exchange rate with goats: 114 crabs / 6 crabs/goat = <<114/6=19>>19 goats #### 19 An adult panda can eat 138 pounds of bamboo each day. A baby panda can eat 50 pounds of bamboo a day. How many pounds of bamboo will the pandas eat in a week? An adult panda will eat 138 pounds of bamboo * 7 days = <<138*7=966>>966 pounds. A baby panda will eat 50 pounds * 7 days = <<50*7=350>>350 pounds. Total the pandas will eat 966 pounds + 350 = <<966+350=1316>>1316 pounds of bamboo. #### 1316 Lily goes to the supermarket. She has $60. She needs to buy 6 items: celery, cereal, bread, milk, potatoes, and coffee. She finds a stalk of celery for $5, cereal for 50% off $12, bread for $8, and milk for 10% off $10. She finds potatoes for $1 each and buys 6. How many dollars does she have left to spend on coffee? Lily spends $5+$8=$<<5+8=13>>13 on celery and bread. Lily spends $12*(50/100)=$<<12*(50/100)=6>>6 on cereal. Lily gets 10% off the milk, so she pays 100% - 10% = 90% of its original price. Lily spends $10*90%=$<<10*90*.01=9>>9 on milk. She spends $1*6=$<<1*6=6>>6 on potatoes. Thus, she has $60-$13-$6-$9-$6=$<<60-13-6-9-6=26>>26 left over for coffee. #### 26