Farmer Brown fed 7 chickens and 5 sheep. How many total legs were there among the animals he fed?

The chickens had 7*2=

<<7*2=14>>14 legs. The sheep had 5*4=<<5*4=20>>20 legs. There were 14+20=<<14+20=34>>34 legs. #### 34 Two days ago, Uncle Welly planted 50 roses on his vacant lot. Yesterday, he planted 20 more roses than the previous day. Today, he planted twice the number of roses than two days ago. How many roses did Uncle Welly plant in his vacant lot? Yesterday, Uncle Welly was able to plant 50 + 20 = <<50+20=70>>70 roses. Today, he planted 2 x 50 = <<2*50=100>>100 roses. Therefore, Uncle Welly has 50 + 70 + 100 = <<50+70+100=220>>220 roses planted on his vacant lot. #### 220 In one of the building blocks at Oakland High there are 5 classes. Each class uses 2 whiteboards each and each whiteboard needs about 20ml of ink for a day's use. If ink costs 50 cents per ml, how much (in dollars) would it cost to use the boards for one day? Each ml of ink costs 50 cents so 20 ml costs 20*50 = <<20*50=1000>>1000 cents There are 2 whiteboards in each class so each class needs 2*1000 cents = <<2*1000=2000>>2000 cents There are five classes in the block so they all need 5*1*2000 cents = <<5*1*2000=10000>>10000 cents 100 cents make a dollar so 10000 cents make 10000/100 = $<<10000/100=100>>100 #### 100 Ben has 20 eggs in the fridge. Yesterday, he ate 4 eggs in the morning and 3 in the afternoon. How many eggs does Ben have now? Ben ate 4 + 3 = <<4+3=7>>7 eggs yesterday. So he will have left 20 - 7 = <<20-7=13>>13 eggs. #### 13 While passing by a store, Miley noticed that a bag that cost $150 last week is now on sale for $135. What percent is the discount? The bag is now sold for $150 - $135 = $<<150-135=15>>15 less. The discount is 15/150 = 1/10. Thus, the percent discount is 1/10 x 100% = 10%. #### 10 Frank picked 36 apples. Susan picked 3 times as many apples as Frank. If Susan gave out half of her apples, and Frank sold a third of his, how many in total do they have left? Susan picked 3 times as much as 36 which is 3*36 = <<3*36=108>>108 apples She gave out half which is 108*(1/2) = <<108*(1/2)=54>>54 apples She now has 108-54 = <<108-54=54>>54 apples Frank sold a third of 36 which is 36*(1/3) = <<36*(1/3)=12>>12 apples Frank now has 36-12 = <<36-12=24>>24 apples Altogether they now have 54+24 = <<54+24=78>>78 apples #### 78 Shanna planted 6 tomato plants, 2 eggplant plants, and 4 pepper plants in her summer garden. Half of her tomato plants and one pepper plant died. The remaining plants each gave her 7 vegetables. How many vegetables did she have in all to harvest? Shanna had 6 / 2 = <<6/2=3>>3 surviving tomato plants. She had 4 - 1 = <<4-1=3>>3 surviving pepper plants. Thus, she had 3 + 3 + 2 = <<3+3+2=8>>8 surviving vegetable plants. Each gave her 7 vegetables, so she had 8 * 7 = <<8*7=56>>56 vegetables to harvest in all. #### 56 The football coach makes his players run up and down the bleachers 40 times. Each time they run up and down 32 stairs one way. If each stair burns 2 calories, how many calories does each player burn during this exercise? First find the number of stairs the players climb up and down each time: 32 stairs * 2 = <<32*2=64>>64 stairs Then multiply the number of stairs per run by the number of runs to find the total number of stairs the players climb: 64 stairs/run * 40 runs = <<64*40=2560>>2560 stairs Then multiply the number of stairs by the number of calories each stair burns: 2560 stairs * 2 calories/stair = <<2560*2=5120>>5120 calories #### 5120 Steve is building a bench for the playground and needs 6 lengths of wood that measure 4 feet and 2 lengths of wood that measure 2 feet. How many feet of wood does Steve need to buy? Steve needs 6 lengths of 4 feet of wood or 6 x 4 = <<6*4=24>>24 feet of wood. He also needs 2 lengths of 2 feet of wood or 2 x 2 = <<2*2=4>>4 feet of wood. Altogether, Steve needs 24 feet of wood + 4 feet of wood = <<24+4=28>>28 feet of wood. #### 28 At the aquarium, there are twice as many sharks as stingrays. If there are 28 stingrays, how many fish are there? If sharks are twice the number of stingrays, then the number of sharks at the aquarium is 2 sharks/stingray * 28 stingrays = <<2*28=56>>56 sharks The number of fish in the tank is 56 sharks + 28 stingrays = <<56+28=84>>84 fish #### 84