Daphney buys 5 kg of potatoes at the supermarket. If 2 kg of potatoes costs $6, how much will she pay?

How much does each kg of potatoes cost? ** The price per kilogram of potatoes is $6 / 2 = $

<<6/2=3>>3. How much will Daphney pay? ** To buy 5 kg of potatoes, she will have to pay 5 * $3 = $<<5*3=15>>15. #### 15 Arwen and Elrond picked some flowers. Arwen was able to get 20 tulips and Elrond was able to get twice as many tulips as Arwen did. How many tulips were they able to get in total? How many tulips was Elrond able to get? ** Elrond was able to get 20 x 2 = <<20*2=40>>40 tulips. How many tulips were Arwen and Elrond able to get in total? ** Therefore, the total number of tulips they were able to get is 40 + 20 = <<40+20=60>>60. #### 60 Ben has four boxes with ten basketball cards in each box. His mother gave him five boxes with eight baseball cards. If he gives 58 cards to his classmates, how many cards does he has left? How many cards does Ben have? ** Ben has 4 x 10 = <<4*10=40>>40 basketball cards. How many cards did his mother give him? ** His mother gave him 5 x 8 = <<5*8=40>>40 baseball cards. How many cards does Ben have? ** Thus, Ben has 40 + 40 = <<40+40=80>>80 cards in all. How many cards does Ben have left? ** Therefore, Ben has 80 - 58 = <<80-58=22>>22 cards left. #### 22 Andy is running late. School starts at 8:00 AM and it normally takes him 30 minutes to get there, but today he had to stop for 3 minutes each at 4 red lights and wait 10 minutes to get past construction. If he left his house at 7:15, how many minutes late will he be? How many minutes did Andy have to get to school when he left his house? ** First find how many minute Andy had to get to school when he left his house: 8:00 AM - 7:15 AM = 45 minutes How many minutes did Andy spend waiting at red lights? ** Then find the total time he spent waiting at red lights: 3 minutes/light * 4 lights = <<3*4=12>>12 minutes How many minutes did Andy spend traveling? ** Now add the normal travel time, red light time, and construction wait time to find Andy's total travel time: 30 minutes + 12 minutes + 10 minutes = <<30+12+10=52>>52 minutes How many minutes late is Andy? ** Now subtract the amount of time Andy had when he left his house from that number to find how many minute late he is: 52 minutes - 45 minutes = <<52-45=7>>7 minutes #### 7 Jack will have ten times more handball trophies than Michael has right now in three years. If Michael has 30 trophies right now, and the number of his trophies increases by 100 in three years, what's the total number of trophies they'll have altogether after three years? How many trophies will Michael have in three years? ** In three years, Michael will have 30+100 = <<30+100=130>>130 trophies. How many trophies will Jack have in three years? ** If Michael has 30 trophies now, Jack will have 10*30 = <<30*10=300>>300 in three years. What's the total number of trophies they'll have altogether after three years? ** Altogether, Jack and Michael will have 300+130 = <<300+130=430>>430 handball trophies in three years. #### 430 Colbert is building a treehouse out of wooden planks. The treehouse needs 200 wooden planks. A quarter of these planks come from Colbert’s storage, half of these planks come from Colbert’s parents, 20 planks come from Colbert’s friends and he buys the rest from the store. How many planks of wood does he need to buy from the store to finish his treehouse? How many planks are in Colbert’s storage? ** In Colbert’s storage, there are 200 wooden planks / 4 = <<200/4=50>>50 wooden planks. How many planks are from Colbert’s parents? ** From his parents, there are 200 wooden planks / 2 = <<200/2=100>>100 wooden planks. How many planks does Colbert need to buy from the store? ** So in total, Colbert has not had to buy 50 wooden planks from storage + 100 wooden planks from his parents + 20 wooden planks from his friends = <<50+100+20=170>>170 wooden planks. How many planks does he need to buy from the store? ** He therefore still needs to buy 200 needed wooden planks – 170 owned wooden planks = <<200-170=30>>30 wooden planks. #### 30 Audrey was asleep for 10 hours last night and dreamed for 2/5 of the time. How much of the night was she not dreaming? How many hours did Audrey dream? ** If Audrey was asleep for 10 hours last night and dreamed for 2/5 of the time, she dreamed for 2/5*10 = <<10*2/5=4>>4 hours. How many hours did Audrey sleep without dreaming? ** The total time Audrey slept without dreaming is 10-4 = <<10-4=6>>6 hours. #### 6 Martha has 11 butterflies in her collection. She has twice as many blue butterflies as yellow butterflies. The rest of her butterflies are black. If Martha has 5 black butterflies, how many blue butterflies does she have? How many blue and yellow butterflies does Martha have? ** Martha has 11-5=<<11-5=6>>6 blue and yellow butterflies. How many yellow butterflies does Martha have? ** Martha has 6/3=<<6/3=2>>2 yellow butterflies. How many blue butterflies does Martha have? ** Martha has 2*2=<<2*2=4>>4 blue butterflies. #### 4 Henry wants to buy a t-shirt, a pair of jeans and a pair of socks. The jeans are twice the price of the t-shirt, and the t-shirt is $10 more expensive than the socks. The socks cost $5. How much does Henry need to pay for the pair of jeans? How much does the t-shirt cost? ** The t-shirt costs $10 more than the socks, so it costs $5 + $10 = $15. How much do the jeans cost? ** The jeans are twice the price of the shirt, so they cost 2 * $15 = $<<2*15=30>>30. #### 30 Paula wants to ride the go-karts 1 time and the bumper cars 4 times. It costs 4 tickets to ride the go-karts and 5 tickets to ride the bumper cars. How many tickets does Paula need? How many times does Paula want to go on the go-karts and the bumper cars? ** Paula wants to go on the go-kart 1 time and the bumper cars 4 times. How many tickets does it cost to ride the go-karts? ** The number of tickets needed for the go-karts is 1 × 4 = <<1*4=4>>4. How many tickets does it cost to ride the bumper cars? ** The number of tickets needed for the bumper cars is 4 × 5 = <<4*5=20>>20. How many tickets does Paula need? ** Paula needs 4 + 20 = <<4+20=24>>24 tickets. #### 24