John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight?

How much does the cow weigh initially? ** The cow initially weighs 400*1.5=

<<400*1.5=600>>600 pounds How much did the cow gain? ** So it gained 600 - 400 = <<600-400=200>>200 pounds How much more is it worth after gaining the weight? ** So its value increased by 200*$3 = $<<200*3=600>>600 #### 600 Brandon sold 86 geckos last year. He sold twice that many the year before. How many geckos has Brandon sold in the last two years? How many geckos did Brandon sell last year? ** Last year: 86 geckos How many geckos did Brandon sell two years ago? ** 2 years ago: 86(2)=172 How many geckos did Brandon sell in the last two years? ** Total number of geckos sold 86+172=<<86+172=258>>258 geckos #### 258 Krystian works in the library. He borrows an average of 40 books every day. Every Friday, his number of borrowed books is about 40% higher than the daily average. How many books does he borrow in a week if the library is open from Monday to Friday? How many books does Krystian borrow on Friday? ** The number of books borrowed on Friday is higher by 40 * 40/100 = <<40*40/100=16>>16 books. How many books does Krystian borrow in a week? ** There are 5 days from Monday to Friday inclusive, so Krystian borrows an average of 5 * 40 = <<5*40=200>>200 books during that time. How many books does Krystian borrow in a week? ** With Friday's increase in borrowings, during one week Krystian borrows 200 + 16 = <<200+16=216>>216 books. #### 216 Herman likes to feed the birds in December, January and February. He feeds them 1/2 cup in the morning and 1/2 cup in the afternoon. How many cups of food will he need for all three months? How many days are in the three months? ** December has 31 days, January has 31 days and February has 28 days for a total of 31+31+28 = <<31+31+28=90>>90 days How many cups does he feed them in total? ** He feeds them 1/2 cup in the morning and 1/2 cup in the afternoon for a total of 1/2+1/2 = <<1/2+1/2=1>>1 cup per day How many cups of birdseed will he need? ** If he feeds them 1 cup per day for 90 days then he will need 1*90 = <<1*90=90>>90 cups of birdseed #### 90 John works a job that offers performance bonuses. He makes $80 a day and works for 8 hours. He has the option of working hard to earn the performance bonus of an extra $20 a day, but the extra effort results in a 2-hour longer workday. How much does John make per hour if he decides to earn the bonus? How many hours does John work if he decides to earn the bonus? ** First, we need to determine the length of John's workday if he decides to earn the bonus. We do this by performing 8+2= <<8+2=10>>10 hours for his workday. How much does John make a day? ** Next, we need to determine his overall pay. We do this by performing 80+20=<<80+20=100>>100 dollars a day. How much does John make per hour if he decides to earn the bonus? ** We then determine John's hourly rate by dividing his pay by the number of hours worked, performing 100/10= <<100/10=10>>10 dollars an hour. #### 10 Sally and Bob have made plans to go on a trip at the end of the year. They both decide to work as babysitters and save half of what they've earned for their trip. If Sally makes $6 per day and Bob makes $4 per day, how much money will they both have saved for their trip after a year? How much money does Sally save? ** Saly saves 1/2 * $6/day = $<<1/2*6=3>>3/day. How much money will Sally save in a year? ** Since each year have 365 days, the total amount of money Sally will save in a year is $3/day * 365 days/year = $<<3*365=1095>>1095/year How much money does Bob save? ** Bob saves 1/2 * $4/day = $<<1/2*4=2>>2/day. How much money will Bob save in a year? ** The total amount of money Bob will have saved in a year is $2/day * 365 days/year = $<<2*365=730>>730/year How much money will Sally and Bob have saved for their trip after a year? ** In total, Sally and Bob would have saved $730 + $1095 = $<<730+1095=1825>>1825 #### 1825 John orders food for a massive restaurant. He orders 1000 pounds of beef for $8 per pound. He also orders twice that much chicken at $3 per pound. How much did everything cost? How much did the beef cost? ** The beef cost $8 * 1000 = $<<8*1000=8000>>8000 How much did the chicken cost? ** He buys 1000 * 2 = <<1000*2=2000>>2000 pounds of chicken How much did the chicken cost? ** So the chicken cost 2000 * $3 = $<<2000*3=6000>>6000 How much did everything cost? ** So the total cost is $8000 + $6000 = $<<8000+6000=14000>>14,000 #### 14000 John writes 20 pages a day. How long will it take him to write 3 books that are 400 pages each? How many pages are in each book? ** He wants to write 3*400=<<3*400=1200>>1200 pages How many days will it take him to write 3 books? ** So it will take him 1200/20=<<1200/20=60>>60 days #### 60 Alice has 20 quarters. She wants to exchange them for nickels and so she goes to the bank. After getting back from the bank, she discovers that 20% of the nickels are iron nickels worth $3 each. What is the total value of her money now? How many nickels are in a quarter? ** A quarter is worth five nickels because .25 / .05 = <<.25/.05=5>>5 How many nickels does Alice get from the bank? ** She gets 100 nickels from the bank because 20 x 5 = <<20*5=100>>100 How many of the nickels are iron nickels? ** 20 of the nickels are iron nickels because 100 x .20 = <<100*.20=20>>20 How many of the nickels are regular? ** 80 of the nickels are regular because 100 - 20 = <<100-20=80>>80 How much are the iron nickels worth? ** The iron nickels are worth $60 because 20 x 3 = <<20*3=60>>60 How much are the regular nickels worth? ** The regular nickels are worth $4 because 80 x .05 = <<80*.05=4>>4 What is the total value of her money now? ** Her money is now worth $64 because 60 + 4 = <<60+4=64>>64 #### 64 James has a rainwater collection barrel. For each inch of rain he collects 15 gallons. On Monday it rained 4 inches and on Tuesday it rained 3 inches. He can sell water for $1.2 per gallon. How much money did he make from selling all the water? How many inches did it rain? ** It rained 3+4=<<3+4=7>>7 inches How many gallons did he collect? ** So he collected 7*15=<<7*15=105>>105 gallons How much money did he make from selling all the water? ** So he makes 105*1.2=$<<105*1.2=126>>126 from selling the water #### 126