Every 4 weeks, Helen hand washes her silk pillowcases. It takes 30 minutes to hand wash all of them. In 1 year, how much time does Helen spend hand washing her pillowcases?

She hand washes them every 4 weeks and there are 52 weeks in a year so she washes them 52/4 =

<<52/4=13>>13 times per year It takes her 30 minutes to hand wash the pillowcases and she does this 13 times per year for a total of 30*13 = <<30*13=390>>390 minutes per year #### 390 Timmy plans to ride a skateboard ramp that is 50 feet high. He knows he needs to go 40 mph at the start to make it all the way to the top. He measures his speed on three trial runs and goes 36, 34, and 38 mph. How much faster does he have to go than his average speed to make it up the ramp? His total speed from the trials is 108 because 36 + 34 + 38 = <<36+34+38=108>>108 His average speed was 36 mph because 108 / 3 = <<108/3=36>>36 He needs to go 4 mph faster to make it to the top because 40 - 36 = <<40-36=4>>4. #### 4 A firefighter is paid $30 per hour for a 48-hour workweek. He pays 1/3 of the money on rent and $500 on food and $1000 on taxes per month. Calculate the total amount of money the firefighter has after paying his monthly expenses. The firefighter earns $30/hour * 48 hours/week = $<<30*48=1440>>1440 in a week. In a month, the firefighter earns $1440/week * 4 weeks/month = $5760 His total monthly payment is 1/3 * $5760 = $<<1/3*5760=1920>>1920 His total monthly expenses are $1920 for rent + $500 for food + $1000 for taxes = $<<1920+500+1000=3420>>3420 The total amount of money the firefighter has after his expenses is $5760 - $3420 = $<<5760-3420=2340>>2340 #### 2340 A jewelry box has 10 necklaces and 15 earrings. Jessy goes to the jewelry stores and buys 10 more necklaces and 2/3 as many earrings as before. After returning home, her mother gives her 1/5 times more earrings than the number she purchased at the store. Calculate the total number of jewelry pieces Jessy has in her box if she puts all of them together. The total number of jewelry Jessy had before going to the store is 10 necklaces+15 earrings= <<10+15=25>>25 At the store, Jessy bought 2/3*15 = <<2/3*15=10>>10 earrings. When she got back from the store, Jessy received 1/5*10 = <<1/5*10=2>>2 more earrings than the ones she bought at the store from her mother. The total number of earrings Jessy received from her mother is 2+10 = <<2+10=12>>12 earrings. The total number of earrings Jesy has after being given 12 more from her mother is 10+12 = <<10+12=22>>22 earrings outside the jewelry box. When Jessy puts all the jewelry in the box, the total number becomes 22 new earrings+ 10 new necklaces + 25(the total number of jewelry she had before) = <<22+10+25=57>>57 #### 57 Sara and Joe have a combined height of 120 inches. Joe is 6 inches more than double Sara's height. How tall is Joe? Let x be Sara's height in inches Joe is 6+2x inches tall 120=x+(6+2x) 120=3x+6 114=3x x=<<38=38>>38 inches Joe is 6+2(38)=82 inches #### 82 Nelly wants to buy pizza for herself and her 14 friends. Each pizza costs $12 and can feed 3 people. If Nelly earns $4 a night babysitting the neighbors' kids, how many nights will she have to babysit to afford the pizza? She needs to buy 15 / 3 = <<15/3=5>>5 pizzas. The pizzas cost 5 * $12 = $<<5*12=60>>60 total. It will take her $60 / $4 = <<60/4=15>>15 nights worth of babysitting to afford the pizza. #### 15 Mother made 2 dozen brownies and placed them on the kitchen counter to cool. Father smelled the brownies, came into the kitchen and ate 8 of them. Then, their daughter, Mooney, wandered into the kitchen and ate 4 of the brownies. The next morning, Mother made another two dozen brownies and added them to those remaining from the day before. After that, how many brownies were on the counter? Two dozen brownies is 2 * 12 = <<2*12=24>>24 brownies. After Father ate his 8, there were 24 - 8 = <<24-8=16>>16 brownies remaining on the counter. After Mooney ate her 4, there were 16 - 4 = <<16-4=12>>12 brownies remaining on the counter. Mother made a second batch of two-dozen brownies, or 2 * 12 = <<2*12=24>>24 brownies. After Mother added the second two-dozen, there were 12 + 24 = <<12+24=36>>36 brownies on the kitchen counter. #### 36 Bill has 6 times as many nuts as Harry, and Harry has twice as many nuts as Sue. If Sue has 48 nuts, how many do Bill and Harry have combined? If Sue has 48 nuts, and Harry has twice as many nuts as Sue, Harry has 2*48 = 96 nuts Bill has 6 times as many nuts as Harry, and since Harry has 96 nuts, Bill has 96*6 = <<6*96=576>>576 nuts Combined, Bill and Harry have 576+96 = <<576+96=672>>672 nuts #### 672 John started weightlifting when he was 16. When he first started he could Clean & Jerk 80 kg and he could Snatch 50 kg. He manages to double his clean and jerk and increase his snatch by 80%. What is his new combined total lifting capacity? His clean and jerk goes to 80*2=<<80*2=160>>160 kg His snatch increases by 50*.8=<<50*.8=40>>40 kg So his snatch is now 50+40=<<50+40=90>>90 kg So his total is 160+90=<<160+90=250>>250 kg #### 250 Nikka has a 100 stamp collection. Thirty-five percent of her stamps are Chinese, 20% are US stamps, and the rest are Japanese stamps. How many Japanese stamps does Nikka have? Nikka has 100 x 35/100 = <<100*35/100=35>>35 Chinese stamps. She has 100 x 20/100 = <<100*20/100=20>>20 US stamps. So, Nikka has 35 + 20 = <<35+20=55>>55 stamps that are not Japanese. Thus, Nikka has 100 - 55 = <<100-55=45>>45 Japanese stamps. #### 45