Out of the 500 marbles that Cindy had, she gave her four friends 80 marbles each. What's four times the number of marbles she has remaining?

Cindy gave her four friends 80 marbles each, a total of 4*80 =

<<80*4=320>>320 marbles She was left with 500-320 = <<500-320=180>>180 marbles Four times the number of marbles she has remaining is 180*4 = <<180*4=720>>720 #### 720 Joe’s mother gave him $56 to go to the store. Joe bought 7 notebooks and 2 books. Each notebook costs $4 and each book costs $7. How much money does Joe have left? 7 notebooks cost 7 notebooks x $4/notebook = $<<7*4=28>>28 2 books cost 2 books x $7/book = $<<2*7=14>>14 In total Joe has spent $28 + $14 = $<<28+14=42>>42 He has $56 - $42 = $<<56-42=14>>14 left #### 14 Nathan is buying decorations for his wedding reception. The reception hall will have 20 tables. Each table needs a linen tablecloth ($25 to rent), 4 place settings ($10 each to rent), and a centerpiece. Each centerpiece will have 10 roses ($5 each) and 15 lilies ($4 each). How much will the decorations cost? First find how much the roses for one centerpiece cost: $5/rose * 10 roses = $<<5*10=50>>50 Then find how much the lilies for one centerpiece cost: $4/rose * 15 roses = $<<4*15=60>>60 Then find how much the table settings for one table cost: 4 settings * $10/setting = $<<4*10=40>>40 Then add the cost of both types of flowers, the place settings, and the tablecloth to find the total cost per table: $50 + $60 + $40 + $25 = $<<50+60+40+25=175>>175 Then multiply the cost per table by the number of tables to find the total cost: $175/table * 20 tables = $<<175*20=3500>>3500 #### 3500 Norris saved $29 in September. He saved $25 in October and $31 in November. Then Hugo spent $75 on an online game. How much money does Norris have left? The total amount of money saved is $29 + $25 + $31 = $<<29+25+31=85>>85. Norris has $85 - $75 = $<<85-75=10>>10 left. #### 10 Joe goes camping with his dad on a Friday. Joe's dad has 21 marshmallows, and Joe has four times as much marshmallows as his dad. If Joe’s dad roasts a third of his marshmallows, and Joe roasts half of his marshmallows, how many marshmallows did they roast in total? Joe’s dad roasts 21/3 = <<21/3=7>>7 of his marshmallows. Joe has 21*4 = <<21*4=84>>84 marshmallows. Joe roasts 84/2 = <<84/2=42>>42 of his marshmallows. Joe and his dad roasted 7+42 = <<7+42=49>>49 marshmallows in total. #### 49 There were 80 people at a football game on Saturday. On Monday, 20 fewer people were at the football game. On Wednesday, 50 more people were at the game than on Monday. On Friday, there were the same number of people as on Saturday and Monday combined. If their expected total audience at the football game for a week is 350, how many more people attended the games than they had expected? On Monday, 80 - 20 = <<80-20=60>>60 people attended the game. On Wednesday, 60 + 50 = <<60+50=110>>110 people attended the game. On Friday, 80 + 60 = <<80+60=140>>140 people attended the game. A total of 80 + 60 + 110 + 140 = <<80+60+110+140=390>>390 people attended the games in a week. Therefore, 390 - 350 = <<390-350=40>>40 people more attended the games than they had expected. #### 40 A small pizza has 6 slices, a medium pizza has 8 slices whereas a large pizza has 12 slices. How many slices of pizza will you have if you bought a total of 15 pizzas and you know you ordered 4 small pizzas and 5 medium pizzas? We know that 4 small pizzas and 5 medium pizzas = 4+5 = 9 non-large pizzas were purchased Because a total of 15 pizzas were purchased then 15 - 9 = <<15-9=6>>6 large pizzas were ordered If 1 small pizza has 6 slices then 4 small pizzas will have 4 * 6 = <<4*6=24>>24 slices Similarly, If 1 medium pizza has 8 slices then 5 medium pizzas will have 5 * 8 = <<8*5=40>>40 slices Similarly, If 1 large pizza has 12 slices then 6 large pizzas will have 6 * 12 = <<6*12=72>>72 slices That means in total we have 24 small slices + 40 medium slices + 72 large slices = 24 + 40 + 72 = <<24+40+72=136>>136 slices of pizza #### 136 There are 15 tables in the school's cafeteria. Each table can seat 10 people. Usually, only 1/10 of the seats are left unseated. How many seats are usually taken? The cafeteria can seat 15 x 10 = <<15*10=150>>150 people. Usually, 150 x 1/10 = <<150*1/10=15>>15 seat are unseated. Thus, 150 - 15 = <<150-15=135>>135 seats are usually taken. #### 135 A mother is serving pizza at her son's birthday party. After buying 5 pizzas, she must decide how many slices to divide each pizza into so that everyone at the party ends up with an equal number of slices. There are a total of 20 children at the party, and she can choose to divide each pizza into either 6, 8, or 10 slices. Assuming she does not want to throw away any pizza, how should many slices should she choose to divide the pizzas into to make sure everyone receives an equal amount? Checking each possibility, we can see that dividing each pizza into 6 slices yields 5*6 = 30 total slices, dividing each pizza into 8 slices yields 5*8 = 40 total slices, and dividing each pizza into 10 slices yields 5*10 = 50 total slices. Because each child must receive the same number of slices, the total number of slices must be evenly divisible by 20. The only option that satisfies this requirement is dividing the pizza into 8 slices, as 40/20 = 2 slices per child. Therefore, the mother should divide each pizza into 8 slices. #### 8 Steve spends 1/3 of the day sleeping, 1/6 of the day in school, 1/12 of the day making assignments, and the rest of the day with his family. How many hours does Steve spend with his family in a day? Steve spends 24/3 = <<24/3=8>>8 hours sleeping. He spends 24/6 = <<24/6=4>>4 hours in school. He spends 24/12 = <<24/12=2>>2 hours making assignments. He spends 8 + 4 + 2 = <<8+4+2=14>>14 hours either sleeping, going to school, or making assignments. Hence, Steve spends 24 - 14 = <<24-14=10>>10 hours with his family. #### 10