There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards. If there are 4 hearts on a card, calculate the total cost of the cows when they are sold at $200 each.

If there are 4 hearts on a card, a standard deck of 52 playing cards will have 208 hearts.

There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards, meaning there are 2*208 =

<<2*208=416>>416 cows in Devonshire. The total cost of the cows when they are sold at $200 each is 416*$200 =$<<416*200=83200>>83200 #### 83200 In a town, there are four primary schools. Two of them can teach 400 students at a time, and the other two 340 students at a time. How many students at a time in total, can these four primary schools teach? Two schools can teach 400 students, so in total, they can teach 2 * 400 = <<2*400=800>>800 students. The other two schools can teach 340 students, which gives 2 * 340 = <<2*340=680>>680 students in total. So all four schools can teach 800 + 680 = <<800+680=1480>>1480 students at a time. #### 1480 When Doctor Lindsay works in her office, she usually sees 4 adult patients and 3 child patients every hour. If the cost for an adult's office visit is $50, and the cost for a child's office visit is $25, how much money, in dollars, does Doctor Lyndsay receive in a typical 8-hour day for seeing all her patients? For 4 adult patients per hour, Dr. Lindsay receives 4*50=<<4*50=200>>200 dollars per hour. For the 3 child patients per hour, Dr. Lindsay receives 3*25=<<3*25=75>>75 dollars per hour. Thus, Dr. Lindsay receives 200+75=<<200+75=275>>275 dollars per hour. In an 8-hour day, Dr. Lindsay receives 8*275=<<8*275=2200>>2200 dollars. #### 2200 It takes 2.5 hours to groom a dog and 0.5 hours to groom a cat. What is the number of minutes it takes to groom 5 dogs and 3 cats? 2.5 * 5 = <<2.5*5=12.5>>12.5 hours 0.5 * 3 = <<3*0.5=1.5>>1.5 hours 12.5 + 1.5 hours = <<12.5+1.5=14>>14 hours 14 hours = 14 * 60 = <<14*60=840>>840 minutes It would take 840 minutes to groom 5 dogs and 3 cats. #### 840 Neil baked 20 cookies. He gave 2/5 of the cookies to his friend. How many cookies are left for Neil? Neil gave 20 x 2/5 = <<20*2/5=8>>8 cookies So he is left with 20 - 8 = <<20-8=12>>12 cookies. #### 12 Faye had $20. Today, her mother gave her twice as much as her money. If she bought ten cupcakes at $1.50 each and five boxes of cookies at $3 per box, how much money did she have left? Faye's mother gave her 2 x $20 = $<<2*20=40>>40. So, Faye had a total of $20 + $40 = $<<20+40=60>>60. Ten cupcakes cost 10 x $1.50 = $<<10*1.5=15>>15. Five boxes of cookies cost 5 x $3 = $<<5*3=15>>15. Thus, Faye spent $15 + $15 = $<<15+15=30>>30. Therefore, Faye has $60 - $30 = $<<60-30=30>>30 left. #### 30 A bicycle shop owner adds 3 bikes to her stock every week. After 1 month, she had sold 18 bikes but still had 45 bikes in stock. How many bikes did she have originally? There are approximately 4 weeks in a month. The shop owner added 3 bikes every week for 4 weeks for a total addition of 3*4 = <<3*4=12>>12 bikes The shop owner now has the original number of bikes + <<12=12>>12 bikes She sold 18 bikes within the same time frame She now has a total of 45 bikes which is: the original number of bikes + 12 - 18 = <<45=45>>45 bikes The original number of bikes = 45-12+18 = <<45-12+18=51>>51 bikes #### 51 Susan is taking a two week vacation. She works five days a week and has six days of paid vacation. The rest of her workdays will be unpaid vacation time. She gets paid $15 per hour and works 8 hours a day. How much pay will she miss on her vacation? Susan works 2 * 5 = <<2*5=10>>10 days in two weeks. She is taking 10 - 6 = <<10-6=4>>4 days of unpaid vacation. At $15 per hour, she is paid 15 * 8 = $<<15*8=120>>120 per day. At $120 per day, Susan will miss 120 * 4 = $<<120*4=480>>480 on her vacation. #### 480 A 220-liter barrel has a small leak. It lost 10% of its contents before anyone noticed. How many liters are left in the barrel? The barrel lost 220 * 10 / 100 = <<220*10/100=22>>22 liters before anyone noticed. So, 220 – 22 = <<220-22=198>>198 liters are left in the barrel. #### 198 Tom hasn't been sleeping well lately. He figures he has been getting about 5 hours of sleep each weeknight and 6 hours each night on the weekend. If Tom would ideally like to get 8 hours of sleep each night on both weeknights and weekends, how many hours of sleep is Tom behind on from the last week? Tom ideally wants to sleep 8 hours a night for 7 days, 8 x 7 = <<8*7=56>>56 hours sleep total for the week. Tom has actually only slept 5 hours each weeknight, 5 x 5 = <<5*5=25>>25 hours of sleep. Tom has only slept 6 hours each night on the weekend, 6 x 2 = <<6*2=12>>12 hours of sleep. Total, Tom has gotten 25 + 12 hours = <<25+12=37>>37 hours sleep. The difference between how many hours Tom would like to sleep, 56, and how many hours he's actually slept, 37, is 56 - 37 = <<56-37=19>>19 hours of sleep that Tom is behind on. #### 19