If you buy 2 packs of 500 mL milk, it will cost $2.50. If you buy them individually, they will cost $1.30 each. How much is your total savings from buying ten sets of 2 packs of 500 mL milk?

The price per 500 mL milk from the 2 packs is $2.50/2 = $

<<2.5/2=1.25>>1.25. This means that for each pack of 500 mL milk, you can save $1.30 - $1.25 = $0.05. Ten sets of 2 packs mean 10 x 2 = <<10*2=20>>20 packs of 500 mL of milk. So, your total savings will be $0.05 x 20 = $<<0.05*20=1>>1. #### 1 Ruth goes to school 8 hours a day and 5 days a week. She is in math class 25% of this time. How many hours per week does she spend in math class? She is in school for 40 hours because 5 x 8 = <<5*8=40>>40 She is in math class for 10 hours a week because 40 x .25 = <<40*.25=10>>10 #### 10 Every room in a building has at least two windows and a maximum of 4 windows. There are 122 windows total. If 5 rooms have 4 windows and 8 rooms have 3 windows, how many rooms in the building have 2 windows? Since 5 rooms have 4 windows, this accounts for 20 windows because 4*5=<<4*5=20>>20 windows. Since 8 rooms have 3 windows, this accounts for 24 windows because 8*3=<<8*3=24>>24 windows. There are 78 windows left over because 122-20-24 = <<122-20-24=78>>78. Therefore, there are 39 rooms with 2 windows because 78/2 = <<78/2=39>>39. #### 39 Chip takes 2 pages of notes every day, 5 days a week, for each of his 5 classes. His notebook paper comes in packs of 100 sheets of paper per pack. After 6 weeks, how many packs of notebook paper will Chip use? He takes 2 pages of notes every day for each of his 5 classes so that's 2*5 = <<2*5=10>>10 pages of notes He takes 10 pages of notes every day for 5 days so that's 10*5 = <<10*5=50>>50 pages of notes If he takes 50 pages of notes every week for 6 weeks that's 50*6 = <<50*6=300>>300 pages of notes His notebook paper comes 100 pages per pack and he has taken 300 pages of notes so he used 300/100 = <<300/100=3>>3 packs of notebook paper #### 3 Jackson is laying tile in a courtyard that measures 10 feet by 25 feet. He needs 4 tiles per square foot of space. 40% of the tiles are green marble that costs $3/tile, and the rest are red tile that costs $1.50/tile. How much does he pay total for tile? First find the area of the courtyard: 10 feet * 25 feet = <<10*25=250>>250 feet Then multiply the area by the number of tiles per square foot to find the total number of tiles needed: 250 feet * 4 tiles/square foot = <<250*4=1000>>1000 tiles Then multiply the number of tiles by the percentage that are green to find the total number of green tiles: 1000 tiles * 40% = <<1000*40*.01=400>>400 tiles Subtract that number from the total number of tiles to find the number of red tiles: 1000 tiles - 400 tiles = <<1000-400=600>>600 tiles Multiply the number of red tiles by the price per red tile to find the cost of the red tiles: 600 tiles * $1.50/tile = $<<600*1.5=900>>900 Multiply the number of green tiles by the price per green tile to find the cost of the green tiles: 400 tiles * $3.00/tile = $<<400*3=1200>>1200 Then add the cost of each type of tile to find the total cost: $900 + $1200 = $<<900+1200=2100>>2100 #### 2100 Angela wants to check her math homework answers with her friends, but some of them aren't done yet. Out of 20 problems, Martha has finished 2, Jenna has finished four times the number Martha did minus 2, and Mark has finished half the number Jenna did. If none of the friends worked on any of the same problems, how many problems have no one but Angela finished? Four times the number of problems Martha answered is 4 x 2 = <<4*2=8>>8. So, Jenna answered 8 - 2 = <<8-2=6>>6 problems. The number of problems Mark answered is 6 / 2 = <<6/2=3>>3. The total number of problems Martha, Jenna, and Mark answered is 2 + 6 + 3 = <<2+6+3=11>>11. So, this means Angela was able to answer 20 - 11 = <<20-11=9>>9 problems. #### 9 About 450 000 people lived in Maryville in 2000. In 2005, about 467 000 people lived in Maryville. What is the average number of people added each year? The total increase of people was counted in 2005 - 2000 = <<2005-2000=5>>5 years. In 5 years, there is a total of 467 000 - 450 000 = 17 000 people increase. So, each year, the average number of people added is 17 000/5 = 3 400. #### 3400 John is laying the foundation for 3 homes. Each home needs a slab of concrete that is 100 feet by 100 feet by .5 feet. Concrete has a density of 150 pounds per cubic foot. A pound of concrete cost $.02 per pound. How much does the foundation cost? The volume of the slab is 100*100*.5=<<100*100*.5=5000>>5000 cubic feet So it weighs 5000*150=<<5000*150=750000>>750000 pounds That means the cost is 750000*$0.02=$<<750000*0.02=15000>>15,000 per house So the total cost for all 3 houses is $15000*3=$<<15000*3=45000>>45,000 #### 45000 Emma bought a loaf of bread that had a certain number of slices. Her little cousin Andy ate 3 slices from the bread at two different points in time, and then Emma decided she would make toast with the remaining slices. If she uses 2 slices of bread to make 1 piece of toast bread, how many slices were in the original loaf if she was able to make 10 pieces of toast bread and had 1 slice of bread left? Little Andy ate 3 slices 2 times giving a total of 3*2=<<3*2=6>>6 slices of bread 1 piece of toast bread requires 2 slices of bread so 10 pieces need 10*2=<<10*2=20>>20 slices of bread There is 1 slice of bread left so in total there were 6+20+1=<<6+20+1=27>>27 slices of bread in the loaf #### 27 Jake buys 2-pound packages of sausages. He buys 3 of them and they are $4 a pound. How much does he pay? He bought 2*3=<<2*3=6>>6 pounds of sausage So they cost 6*$4=$<<6*4=24>>24 #### 24