Mark is 18 years old. He has a little brother, John, who is 10 years younger. If John and Mark's parents are currently 5 times older than John, how old were they when Mark was born?

John is 8 years old because 18-10=

<<18-10=8>>8 years old. Their parents are currently 40 years old because 8*5=<<8*5=40>>40. Therefore, they were 22 when Mark was born because 40-18 = <<40-18=22>>22 years old. #### 22 Gerald brings chocolate bars to school for his class to share. Each bar contains 8 squares. He brings 7 total bars. His teacher says that for every bar he brings, she will bring two more identical ones. There are 24 students in class. How many squares of chocolate does each student get? The teacher brings 14 bars to school because 7 x 2 = <<7*2=14>>14 There are 21 total bars of chocolate because 7 + 14 = <<7+14=21>>21 There are 168 total squares of chocolate because 21 x 8 = <<21*8=168>>168 Each student gets 7 squares because 168 / 24 = <<168/24=7>>7 #### 7 Vincent's bookstore is divided into different kinds of books. His top-selling books are fantasy books. He also sells literature books which cost half of the price of a fantasy book. If his fantasy books cost $4 each, and he sold five fantasy books and eight literature books per day, how much money will he earn after five days? Vincent earns $4 x 5= $<<4*5=20>>20 for selling 5 fantasy books per day. The price of the literature book is $4/2 = $<<4/2=2>>2 each. He earns $2 x 8= $<<2*8=16>>16 per day for selling 8 literature books. So the total money he earns per day is $16 + $20= $<<16+20=36>>36. Therefore, he will earn $36 x 5= $<<36*5=180>>180 after 5 days. #### 180 Bronson is an apple dealer. He buys apples from farmers and then transports them to the grocery stores and sells them for profit. He buys individual apples from farmers at a cost of $12 per bushel, and sells them to the stores at a price of $0.40 per apple. If each bushel contains 48 apples, then how much profit, in dollars, does he make after selling 100 apples? At a cost of $12 per bushel, and with 48 apples per bushel, then each apple costs Bronson $12/48=$<<12/48=0.25>>0.25 If he sells the apples to the stores at $0.40 per apple, then he makes a profit of $0.40-$0.25=$<<0.4-0.25=0.15>>0.15 per apple. After selling 100 apples to the store, his profit would be 100*$0.15=$<<100*0.15=15>>15. #### 15 Betty ordered 18 items in an online shop via cash on delivery. She ordered 6 pieces of slippers that cost $2.5 each, 4 pieces of lipstick for $1.25 each, and 8 pieces of hair color for $3 each. How much did Betty pay in total when it was delivered? Betty paid 6 x $2.5 = $<<6*2.5=15>>15 for the slippers. She paid 4 x $1.25 = $<<4*1.25=5>>5 for the lipsticks. She paid 8 x $3 = $<<8*3=24>>24 for the hair color. Therefore, Betty paid $15 + $5 + $24 = $<<15+5+24=44>>44 in total. #### 44 Oliver owns a laundry shop, and he charges $2 per kilo of laundry. Two days ago, his shop washed a total of 5 kilos of laundries. Yesterday, it washed five kilos of laundries more than the previous day. Today, it washed twice the number of kilos than yesterday. How much did he earn for three days? Yesterday, his shop washed 5 + 5 = <<5+5=10>>10 kilos of laundry. Today, it washed 2 x 10 = <<2*10=20>>20 kilos of laundry. Thus, Oliver's shop washed a total of 5 + 10 + 20 = <<5+10+20=35>>35 kilos of laundries for three days. Therefore, his shop earned 35 x $2 = $<<35*2=70>>70 for three days. #### 70 Ian used a grocery delivery app to have his groceries delivered. His original order was $25 before delivery and tip. He noticed that 3 items changed on his order. A $0.99 can of tomatoes was replaced by a $2.20 can of tomatoes, his $1.00 lettuce was replaced with $1.75 head of lettuce and his $1.96 celery was replaced with celery that cost $2.00. Delivery and tip came to a total of $8.00. How much is his new bill now, with the food substitutes and delivery/tip? He ordered a can of tomatoes for $0.99 but they subbed with one that cost $2.20 for a difference of 2.20-.99 = $<<2.20-.99=1.21>>1.21 He ordered lettuce for $1.00 but they subbed with one that cost $1.75 for a difference of 1.75-1.00 = $<<1.75-1.00=0.75>>0.75 His celery for $1.96 but they subbed with one that cost $2.00 for a difference of 2.00-1.96 = $0.04 That's an additional charge of 1.21+.75+.04 = $<<1.21+.75+.04=2.00>>2.00 in groceries His additional charges of $2.00 and the delivery/tip of $8.00 add 2+8 = $<<2+8=10.00>>10.00 to the order His original order was $25 and they added $10.00 so his new order is 25+10 = $<<25+10=35.00>>35.00 #### 35 A fruit basket consists of 4 bananas, 3 apples, 24 strawberries, 2 avocados, and a bunch of grapes. One banana costs $1. An apple costs $2. 12 strawberries cost $4. An avocado costs $3, and half a bunch of grapes costs $2. What is the total cost of the fruit basket? The bananas cost 4 x $1 = $<<4*1=4>>4 The apples cost 3 x $2 = $<<3*2=6>>6 The strawberries cost (24/12) x $4 = $<<(24/12)*4=8>>8 The avocados cost 2 x $3 = $<<2*3=6>>6 The grapes cost 2 x $2 = $<<2*2=4>>4 The total cost of the fruit basket is $4 + $6 + $8 + $6 + $4 = $<<4+6+8+6+4=28>>28 #### 28 Carl is figuring out how much he'll need to spend on gas for his upcoming road trip to the Grand Canyon. His car gets 30 miles per gallon in cities and 40 miles per gallon on the highway. The distance from his house to the Grand Canyon, one way, is 60 city miles and 200 highway miles. If gas costs $3.00 per gallon, how much will Carl need to spend? First figure out how many city miles Carl will drive round trip by multiplying the one-way number of city miles by 2: 60 miles * 2 = <<60*2=120>>120 miles Then figure out how many highway miles Carl will drive round trip by multiplying the one-way number of highway miles by 2: 200 miles * 2 = <<200*2=400>>400 miles Now divide the round-trip number of city miles by the number of city miles per gallon Carl's car gets: 120 miles / 30 mpg = <<120/30=4>>4 gallons Now divide the round-trip number of highway miles by the number of highway miles per gallon Carl's car gets: 400 miles / 40 mpg = <<400/40=10>>10 gallons Now add the gallons for the highway miles and the city miles to find the total number of gallons Carl needs to buy: 10 gallons + 4 gallons = <<10+4=14>>14 gallons Finally, multiply the number of gallons Carl needs to buy by the cost per gallon to find out how much he spends: 14 gallons * $3.00 = $<<14*3=42.00>>42.00 #### 42 Mari made 4 more than five times as many decorated buttons as Kendra. Sue made half as many as Kendra. Sue made 6 buttons. How many did Mari make? Kendra made 2*6=<<2*6=12>>12. Mari made 4+5*12=<<4+5*12=64>>64. #### 64