Roberto is raising chickens for eggs. He buys 4 chickens for $20 each. They cost $1 in total a week to feed and each produces 3 eggs a week that will last forever. He used to buy 1 dozen eggs a week and spent $2 per dozen. After how many weeks will the chickens be cheaper than buying his eggs?

The chickens cost $80 because 4 x 20 =

<<4*20=80>>80 His chickens produce a dozen eggs a week because 4 x 3 = <<4*3=12>>12 Each week that he has chickens is $1 cheaper than buying eggs because 2 - 1 = <<2-1=1>>1 After 80 weeks his chickens will be paid off because 80 / 1 = <<80/1=80>>80 After 81 weeks the chickens will be cheaper than buying eggs because 80 + 1 = <<80+1=81>>81 #### 81 Claire has 400 flowers in her garden. One hundred twenty are tulips, and the rest are roses. Eighty of the roses are white, while the rest are red. Each red rose is worth $0.75. How much will Claire earn if she can sell 1/2 of the total number of red roses? Claire has 400 - 120 = <<400-120=280>>280 roses in her garden. Thus, she has 280 - 80 = <<280-80=200>>200 red roses. One-half of the red roses is equal to 1/2 x 200 = <<1/2*200=100>>100. Therefore, Claire will earn $0.75 x 100 = $75 if she can sell 1/2 of the total number of red roses. #### 75 John drinks 1.5 gallons of water a day. How many quarts does he drink a week? He drinks 1.5*4=<<1.5*4=6>>6 quarts a day That means he drinks 6*7=<<6*7=42>>42 quarts a week #### 42 After a trip, Mrs. Nalani took the students to the restaurant and told them they could order either a burger or a hot dog. If the number of students who ordered burgers was 30, twice the number of students who called for a hot dog, calculate the number of students at the restaurant. If the 30 students who ordered burgers were twice the number of students who ordered hot dogs, then 30/2 = <<30/2=15>>15 students ordered hot dogs. The total number of students is 15 + 30 = <<15+30=45>>45 #### 45 A tailor purchased buttons for the clothes. She bought 90 green buttons, 10 more yellow buttons than the green buttons, and 5 fewer blue buttons than the green buttons. How many buttons did the tailor purchase? The tailor bought 90 + 10 = <<90+10=100>>100 yellow buttons. He also bought 90 - 5 = <<90-5=85>>85 blue buttons. Therefore, The tailor purchased 90 + 100 + 85 = <<90+100+85=275>>275 buttons. #### 275 Olivia gave William 10 napkins. Amelia also gives William twice the number of napkins Olivia gave him. If William had 15 napkins before, how many napkins does he have now? After Olivia gave William 10 napkins, he ends up with 15+10= <<10+15=25>>25 napkins. Amelia gives William twice the number of napkins given to him by Amelia which is 2*10 = <<2*10=20>>20 napkins. The total number of napkins William has now is 20+25 = <<20+25=45>>45 napkins. #### 45 Pastor Paul prays 20 times per day, except on Sunday, when he prays twice as much. Pastor Bruce prays half as much as Pastor Paul, except on Sundays, when he prays twice as much as Pastor Paul. How many more times does Pastor Paul pray than Pastor Bruce prays in a week? Pastor Paul prays 20*6=<<20*6=120>>120 days per week, except Sunday. On Sunday, Pastor Paul prays 2*20=<<2*20=40>>40 times. Per week, Pastor Paul prays 120+40=<<120+40=160>>160 times. Pastor Bruce prays half as much as Pastor Paul does on all days except Sunday, for a total of 120/2=<<120/2=60>>60 times. Pastor Bruce prays twice as much on Sundays as does Pastor Paul, or 40*2=<<40*2=80>>80 times. In total, Pastor Bruce prays 60+80=<<60+80=140>>140 times per week. Thus, per week, Pastor Paul prays 160-140=<<160-140=20>>20 more times per week than Pastor Bruce. #### 20 A local music festival is held every year for three days. The three day attendance this year was 2700 people. The second day was rainy so only half the number of people that showed up the first day showed up the second day. The third day was the finale, so attendance was triple the original day. How many people attended the second day of the festival? Let x represent the attendance the first day Second day: x/2 Third day: 3x Total:x+(x/2)+3x=<<2700=2700>>2700 (9/2)x=2700 9x=5400 x=<<600=600>>600 Second day:600/2=<<600/2=300>>300 people #### 300 Mikail's birthday is tomorrow. He will be 3 times older than he was when he was three. On his birthday, his parents give him $5 for every year old he is. How much money will they give him? Mikail is 9 because 3 x 3 = <<3*3=9>>9 He will get $45 because 9 x $5 = $<<9*5=45>>45 #### 45 Vinnie is writing an essay and needs to make sure that he has not exceeded the 1000-word limit. He wrote 450 words on Saturday and 650 words on Sunday. How many words has Vinnie exceeded the limit by? Vinnie has written a total of 450 words on Saturday + 650 words on Sunday = <<450+650=1100>>1100 words. He has therefore exceeded the limit by 1100 written words – 1000 word limit = <<1100-1000=100>>100 words. #### 100