Bob, Tom, Sally, and Jerry had dinner at their favorite pizzeria. They decide to share 2 pizzas. Bob ate half of a pizza on his own. Tom ate one-third of a pizza. Sally wasn't very hungry and only ate one-sixth of a pizza, and Jerry ate a quarter of a pizza. If each pizza is cut into 12 slices, how many slices were left over?

Each pizza is 12 slices. Bob at 12 slices / 2 =

<<12/2=6>>6 slices. Tom ate one third, or 12 slices / 3 = <<12/3=4>>4 slices. Sally ate one sixth, or 12 slices / 6 = <<12/6=2>>2 slices. Jerry ate one quarter, or 12 slices / 4 = <<12/4=3>>3 slices. In total, they ate 6 slices + 4 slices + 2 slices + 3 slices = <<6+4+2+3=15>>15 slices. So they were left with 12 slices per pizza * 2 pizzas - 15 slices = 24 slices - 15 slices = <<12*2-15=9>>9 slices. #### 9 Joe sells cookies for 20% more than it costs to make them. If he sold 50 cookies and earned $60, how much do the cookies cost to make? He sold the cookies for $1.20 each because 60 / 50 = <<60/50=1.2>>1.2 They cost $1 to make because 1.2 / 1.2 = <<1.2/1.2=1>>1 #### 1 Chris has half as many cookies as Kenny. Glenn has four times as many cookies as Kenny. How many cookies do these three boys have, if Glenn has 24 cookies? Kenny has 24/4 = <<24/4=6>>6 cookies. Chris has 6/2 = <<6/2=3>>3 cookies. These three boys have 24+6+3= <<24+6+3=33>>33 cookies. #### 33 Ronald is rolling a die and won't stop rolling until the average of all his rolls is a 3. He rolls a 1, a 3, a 2, a 4, a 3, a 5, a 3, a 4, a 4 and a 2. What does he need to roll on the next roll to be able to stop? The next roll will be his 11th roll. The total on this tenth roll to have an average of 3 is 33, because 3 * 11 = <<33=33>>33 His current total is 31 because 1 + 3 + 2 + 4 + 3 + 5 + 6 + 1 + 4 + 2= <<1+3+2+4+3+5+6+1+4+2=31>>31 He needs to roll a 2 because 33 - 31 = <<33-31=2>>2 #### 2 There are 15 girls and 10 boys in Ms. Smith's class. She divided 375 books equally among them. How many books did all the girls get combined? There are 15+10 = <<15+10=25>>25 students in the class 375 books were divided equally among them for a total of 375/25 = <<375/25=15>>15 books each 15 girls will get a total of 15*15 = <<15*15=225>>225 books #### 225 Carol spends five hours filling up her pool. During the first hour, the pool fills at a rate of 8 gallons of water per hour. For the next two hours, the pool fills at 10 gallons of water per hour. For the fourth hour, the pool fills at a rate of 14 gallons of water per hour. During the fifth hour, the pool develops a leak and loses 8 gallons of water. At the end of five hours, how many gallons of water are still left in the pool? 8 gallons of water added during the first hour 10 gallons of water added during the second hour 10 gallons of water added during the third hour 14 gallons of water added during the fourth hour The total gallons of water added by the fourth hour is 8+10+10+14=<<8+10+10+14=42>>42 The number of gallons in the pool after losing 8 gallons in the fifth hour is 42-8=<<42-8=34>>34 #### 34 John buys 20 candy bars. His brother Dave pays for 6 of them. If each candy bar costs $1.50, how much did John pay? He paid for 20-6=<<20-6=14>>14 candy bars So he paid 14*1.5=$<<14*1.5=21>>21 #### 21 Steve puts $100 into the bank. Each year he earns 10% interest on the money in the account. How much money will be in the bank after 2 years? At the end of the first year, there will be $100 * (110/100) = $<<100*110/100=110>>110 in the bank account. At the end of the second year, there will be $110 * (110/100) = $<<110*(110/100)=121>>121 #### 121 Kim has 4 dozen shirts. She lets her sister have 1/3 of them. How many shirts does she have left? She had 4*12=<<4*12=48>>48 shirts to start with She gives away 48/3=<<48/3=16>>16 So she has 48-16=<<48-16=32>>32 left #### 32 Javier is having an eating contest with his brother. It's ravioli night and there is meat ravioli, pumpkin ravioli, and cheese ravioli. The meat ravioli weighs 1.5 ounces each. The pumpkin ravioli is 1.25 ounces each. The cheese ravioli is one ounce. Javier eats 5 meat ravioli, 2 pumpkin ravioli, and 4 cheese ravioli. His brother just ate pumpkin ravioli and had 12 of them. What is the total amount of ounces eaten by the winner? Javier ate 7.5 ounces of meat ravioli because 5 x 1.5 = <<7.5=7.5>>7.5 He ate 2.5 ounces of pumpkin ravioli because 2 x 1.25 = <<2*1.25=2.5>>2.5 He ate 4 ounces of cheese ravioli because 4 x 1 = <<4*1=4>>4 Javier ate 14 ounces in total because 7.5 + 2.5 + 4 = <<7.5+2.5+4=14>>14 His brother ate 15 ounces of pumpkin ravioli because 12 x 1.25 = 15 The winner ate 15 ounces in total because 15 > 14 #### 15