Donny saves $15 on Monday, $28 on Tuesday and $13 on Wednesday. On Thursday he spends half of his total savings so far. How much did he spend?

Donny saves a total of $15+$28+$13 = $

<<15+28+13=56>>56 across all 3 days He spends half of his total savings which is $56*(1/2) = $<<56*(1/2)=28>>28 #### 28 Nora is selling muffins to raise $120 for an upcoming school trip. She has packaged the muffins in cases. Each case has three packs of muffins. Each pack has four muffins. If she prices each muffin at two dollars, how many cases of muffins must she sell to raise enough money for the trip? If Nora prices each muffin at two dollars, she will sell 1 pack for 2 * 4 = <<1*2*4=8>>8 dollars Since there are 3 packs to a case, the case will be sold for 3 * 8 = <<3*8=24>>24 dollars It therefore means that she needs to sell 120/24 = <<120/24=5>>5 cases of muffins. #### 5 A farm has 100 chickens. 20 percent are Black Copper Marans, and 80 percent of the Black Copper Marans are hens. How many BCM hens are there? Black Copper Marans: 100(.20)=20 BCM Hens:20(.80)=16 #### 16 Méliès bought 2 kg of meat. The meat costs $82 per kilogram. Méliès has $180 in his wallet. How much money does he have left after paying for the meat? Méliès paid 2 x $82 = $<<2*82=164>>164 for the 2 kg of meat. So he has $180 – $164 = $<<180-164=16>>16 left. #### 16 Meghan had money in the following denomination: 2 $100 bills, 5 $50 bills, and 10 $10 bills. How much money did he have altogether? Total value of $100 bills is 2 × $100 = $<<2*100=200>>200 Total value of $50 bills is 5 × $50 = $<<5*50=250>>250 Total value of $10 bills is 10 × $10 = $<<10*10=100>>100 Final total value is $200 + $250 + $100 = $<<200+250+100=550>>550 #### 550 The Zargon Destroyer spacecraft can travel at 2 billion miles per hour in normal space, but when moving through a black hole they travel three times faster. If the Zargon Destroyer is making a voyage that travels seven hours in normal space and two hours through a black hole, how many billions of miles would they have traveled? A spacecraft flying through normal space for seven hours at 2-billion miles per hour travels 7*2=<<7*2=14>>14 billion miles. A spacecraft flying through a black hole at 3*2=<<3*2=6>>6 billion miles per hour. Thus, a spacecraft flying through a black hole for two hours travels 2*6=<<2*6=12>>12 billion miles. Therefore, in total, the Zargon spacecraft will travel 14+12=<<14+12=26>>26 billion miles. #### 26 Carly is thinking about buying a wallet that costs $22 and a purse that costs $3 less than four times the cost of the wallet. What is the combined cost of both items? First quadruple the price of the wallet: $22 * 4 = $<<22*4=88>>88 Then subtract $3 to find the cost of the purse: $88 - $3 = $<<88-3=85>>85 Then add the price of the wallet and purse to find the total cost: $85 + $22 = $<<85+22=107>>107 #### 107 Elizabeth has 20 dollars and wants to buy pens and pencils. Each pencil costs $1.60 and each pen cost 2 dollars. How many pencils can she buy with her 20 dollars if she wants 6 pens? Elizabeth spends 6*2 = <<6*2=12>>12 dollars on pens. Elizabeth has 20-12 = <<20-12=8>>8 dollars to spend on pencils. Elizabeth can buy 8/1.6 = <<8/1.6=5>>5 pencils. #### 5 If Pete read twice as many books as Matt did last year, and this year he doubles that number while Matt reads only 50% more, how many books does Pete read across both years if Matt read 75 books in his second year? First, we need to find the amount Matt read both years to establish what Pete read, so to find Matt's first-year total we multiply 75 / 1.5 = <<75/1.5=50>>50 books the previous year. Since Pete read twice as many books as Matt did in the first year, and Matt's first-year total is 50, this means Pete read 50*2=<<50*2=100>>100 books his first year. Since Pete doubled the number of books he read the following year, this means Pete read 100*2=<<100*2=200>>200 books the following year. We add the two years of Pete's reading together to find 200+100=<<200+100=300>>300 books read in total. #### 300 Alex has some new shirts. Joe has 3 more new shirts than Alex. Ben has eight more new shirts than Joe. If Ben has 15 new shirts, how many new shirts does Alex have? Joe has 15-8=<<15-8=7>>7 new shirts. Alex has 7-3=<<7-3=4>>4 new shirts. #### 4