There are 20 boys and 11 girls in the second grade and twice that number in the third grade. How many students are in grades 2 and 3?

There are 20 + 11 =

<<20+11=31>>31 students in second grade. There are 31 x 2 = <<31*2=62>>62 students in third grade. In total, there are 31 + 62 = <<31+62=93>>93 students. #### 93 Borgnine wants to see 1100 legs at the zoo. He has already seen 12 chimps, 8 lions, and 5 lizards. He is next headed to see the tarantulas. How many tarantulas does he need to see to meet his goal? He has seen 48 chimp legs because 12 x 4 = <<12*4=48>>48 He has seen 32 lion legs because 8 x 4 = <<8*4=32>>32 He has seen 20 lizard legs because 5 x 4 = <<5*4=20>>20 He has seen 100 total legs because 48 + 32 + 20 = <<48+32+20=100>>100 He has to see 1000 tarantulas legs because 1100- 100 = <<1100-100=1000>>1000 He has to see 125 tarantulas because 1000/ 8 = <<1000/8=125>>125 #### 125 A spiral notebook costs $15, and a personal planner costs $10. How much would it cost in total to buy 4 spiral notebooks and 8 personal planners at a 20% discount? If a spiral notebook cost $15, a 20% discount would reduce the price by 20/100 *15 = $<<15*0.2=3>>3 At a 20% discount, the buying price of a spiral notebook book is $15-$3= $<<15-3=12>>12 At the same discount, a personal planner cost would reduce by 20/100 * $10 = $<<20/100*10=2>>2 The new buying price of a personal planner will be $10-$2 =$<<10-2=8>>8 To buy four spiral notebooks at a 20% discount, you'll pay 4*$12 = $<<4*12=48>>48 At the same time discount, you'll buy eight personal planners at a cost pf 8*$8 = <<8*8=64>>64 In total, to buy eight personal planners and four spiral notebooks, you'd have to pay $64+$48 = $112 #### 112 Todd has $20. He buys 4 candy bars that cost $2 each. How much money in dollars does Todd have left? The candy bars cost 4*2= $<<4*2=8>>8. Todd has 20-8= $<<20-8=12>>12 left. #### 12 Trent cries 2 tears for every three onions he chops. He needs to chop 4 onions per pot of soup. If he's making 6 pots of soup, how many tears does he cry? First find how many onions total Trent needs to chop: 4 onions/pot * 6 pots = <<4*6=24>>24 onions Then divide that number by three onions per 2 tears to find how many sets of two tears Trent cries: 24 onions / 3 onions = <<24/3=8>>8 Then multiply that number by the number of tears per set to find the total number of tears: 8 * 2 tears = <<8*2=16>>16 tears #### 16 Brittany has 3 gerbils: Puffy, Muffy, and Scruffy. Puffy weighs 5 ounces more than Muffy. Muffy weighs 3 ounces less than Scruffy. If Scruffy weighs 12 ounces, how much would the scale indicate, in ounces, if Brittany put Puffy and Muffy on the scale? Muffy weighs 12 - 3 = <<12-3=9>>9 ounces Puffy weighs 5 + 9 = <<5+9=14>>14 ounces. If Brittany weighs both Puffy and Muffy, the scale would read 9 + 14 = <<9+14=23>>23 ounces #### 23 John buys 4 pounds of beef. He uses all but 1 pound in soup. He uses twice as many pounds of vegetables as beef. How many pounds of vegetables did he use? He used 4-1=<<4-1=3>>3 pounds of beef So he used 3*2=<<3*2=6>>6 pounds of vegetables #### 6 Osborn is testing a new way to get dressed in the morning on school days so he goes faster and can get up later. He tracks his time for the week and on Monday is takes him 2 minutes. On Tuesday it takes him 4 minutes. On Wednesday it takes him 3 minutes. On Thursday it takes him 4 minutes. Before Friday arrives he looks at his old way of getting dressed and sees that it was taking him 3 minutes on average to get dressed. How fast does he have to get dressed on Friday so his weekly average ties his old method? If it takes on average 3 minutes to get dressed, then it takes 15 minutes total on the school week because 5 x 3 = <<15=15>>15 Thus far this week it has taken him 13 minutes to get dressed because 2 + 4 + 3 + 4 = <<13=13>>13 To tie his previous method, he needs to take 2 minutes on Friday because 15 - 13 = <<15-13=2>>2 #### 2 Rob and Mark plan to meet at the national park. It takes 1 hour for Rob to get to the national park and it takes three times as much time for Mark to get to the national park. If Rob leaves his home at 11 a.m., at what time should Mark leave his home so that they both arrive at the same time? It takes 1 hour * 3 = <<1*3=3>>3 hours for Mark to get to the national park. The extra time it takes Mark to get to the national park is 3 hours - 1 hour = <<3-1=2>>2 hours Mark should leave his home at 11 a.m. - 2 hours = <<11-2=9>>9 a.m. #### 9 Jenny's property tax rate is 2%. Her house is currently worth $400,000. The city is about to build a new high-speed rail project nearby, which will increase her house's value by 25%. Jenny can only afford to spend $15,000/year on property tax. How many dollars worth of improvements can she make to her house before her property tax bill gets too high? First find how much the rail project will increase the house value by multiplying the initial value by 25%: $400,000 * .25 = $<<400000*.25=100000>>100,000 Then add that amount to the initial value to find the new value: $100,000 + $400,000 = $<<100000+400000=500000>>500,000 Then divide the maximum amount of property tax Jenny can afford to pay by the property tax rate to find the maximum value her house can have: $15,000 / .02 = $<<15000/.02=750000>>750,000 Now subtract the house's value after the rail project from the maximum value to find how much value the improvements can have: $750,000 - $500,000 = $<<750000-500000=250000>>250,000 #### 250000