James had two browsers on his computer. In each browser, he opened three windows, each with ten tabs. What's the total number of tabs he opened in all the browsers together?

The total number of tabs in three windows of each browser is 10*3 =

<<10*3=30>>30 tabs. If James had two browsers on his computer and in each browser he opened three windows, the total number of tabs in the two browsers is 2*30 = <<2*30=60>>60 tabs. #### 60 It was Trevor's job to collect fresh eggs from the family's 4 chickens every morning. He got 4 eggs from Gertrude and 3 eggs from Blanche. Nancy laid 2 eggs as did Martha. On the way, he dropped 2 eggs. How many eggs did Trevor have left? He collected 4+3+2+2 eggs for a total of <<4+3+2+2=11>>11 eggs. He dropped 2 eggs so 11-2 = <<11-2=9>>9 eggs left #### 9 If I give my brother 2 marbles I will have double his number of marbles, but my friend will have triple the number I do. The total number of marbles we have together is 63. How many marbles do I have? Let X be the number of marbles I have. If I give my brother 2 marbles, I'll have X-2 marbles left. And my brother will have (X-2)/2 marbles. And my friend will have (X-2)*3 left. So the total number of marbles is X-2 + (X-2)/2 + (X-2)*3 = 63. (X-2)*9/2 = 63. X-2 = 14. X = <<16=16>>16 marbles. #### 16 The teacher agrees to order pizza for the class. For every student in the class, she will buy 2 pieces of cheese and 1 piece of onion and they will eat exactly that amount. A large pizza has 18 slices. She orders 6 total pizzas and there are 8 pieces of cheese and 4 pieces of onion leftover. How many students are in the class? Cheese pizzas are 2/3 of the pizza's purchased because 2 / (2+1) = 2/3 She buys 4 cheese pizzas because 6 x (2/3) = <<6*2/3=4>>4 These give her 72 pieces of cheese pizza because 4 x 18 = <<4*18=72>>72 The students at 64 pieces of cheese because 72 - 8 = <<72-8=64>>64 There are 32 students in her class because 64 / 2 = <<64/2=32>>32 #### 32 Bert bought some unique stamps for his collection. Before the purchase, he had only half the stamps he bought. If he bought 300 stamps, how many stamps does Bert have in total after the purchase? Before the purchase, Bert had 300 * 1/2 = <<300*1/2=150>>150 stamps. So after the purchase he has 300 + 150 = <<300+150=450>>450 stamps. #### 450 In seven years, Talia will be 20 years old. Talia's mom is currently three times as old as Talia is today. In three years, Talia's father will be the same age as Talia's mom is today. Currently, how many years old is Talia's father? In seven years, Talia will be 20 years old, and therefore Talia is currently 20-7=<<20-7=13>>13 years old. Talia's mom is currently three times as old as Talia is today, or 3*13=<<3*13=39>>39 years old. If in three years, Talia's father will be the same age as Talia's mom is today, then Talia's father is currently 39-3=<<39-3=36>>36 years old. #### 36 Louise is hanging 30 of her pictures on the wall. She hangs some of them vertically, half of them horizontally, then hangs the remaining 5 pictures haphazardly. How many pictures did Louise hang vertically? There are 30 / 2 = <<30/2=15>>15 pictures hanging horizontally. So there is a total of 15 + 5 = <<15+5=20>>20 pictures hanging either horizontally or haphazardly. Therefore, there are 30 – 20 = <<30-20=10>>10 pictures hanging vertically. #### 10 A soccer ball takes twenty minutes to inflate. Alexia and Ermias are inflating balls, with Alexia inflating 20 balls and Ermias inflating 5 more balls than Alexia. Calculate the total time in minutes they took to inflate all the soccer balls. To inflate a soccer ball, it takes 20 minutes, and if Alexia inflated 20 soccer balls, she took 20*20 = <<20*20=400>>400 minutes. Ermias has 5 more soccer balls than Alexia, meaning she has a total of 20+5 = <<5+20=25>>25 soccer balls. If each soccer ball takes 20 minutes to inflate, Ermias took 25*20 = <<25*20=500>>500 minutes to inflate all the soccer balls she had. Alexia and Ermias took 400+500 = <<400+500=900>>900 minutes to inflate all the soccer balls. #### 900 As soon as you enter the taxi, you pay a ride fee of $2. Michelle rode a taxi from her office to her home, which constitutes 4 miles. If the taxi charge per mile is $2.5, how much did pay Michelle pay in total for her ride? The taxi charge for a distance of 4 miles is 4 x $2.5 = $<<4*2.5=10>>10. The total amount that Michelle paid for the ride was $2 + $10 = $<<2+10=12>>12. #### 12 John cuts his grass to 2 inches. It grows .5 inches per month. When it gets to 4 inches he cuts it back down to 2 inches. It cost $100 to get his grass cut. How much does he pay per year? He cuts his grass 4-2=<<4-2=2>>2 inches So he gets it cut every 2/.5=<<2/.5=4>>4 months That means he gets it cut 12/4=<<12/4=3>>3 times a year So he pays 100*3=$<<100*3=300>>300 per year #### 300