James splits 4 packs of stickers that have 30 stickers each. Each sticker cost $.10. If his friend pays for half how much did James pay?

He buys 4*30=

<<4*30=120>>120 stickers That means it cost 120*.1=$<<120*.1=12>>12 So he pays 12*.5=$<<12*.5=6>>6 #### 6 To keep himself busy in class, Michael makes rubber-band balls. He makes two sizes, large and small. A small ball uses 50 rubber bands. A large ball requires 300 rubber bands. Michael brought a 5,000 pack to class and already made 22 small balls. How many large balls can he make with the remaining rubber bands? Michael has used 1,100 rubber bands because 22 x 50 = <<22*50=1100>>1,100 Michael has 3,900 rubber bands remaining because 5,000 - 1,100 = 3,900 Michael can make 13 large balls because 3,900 / 300 = <<3900/300=13>>13 #### 13 There are 11 males & 12 females in the orchestra and twice that number in the band. There are 12 males & 17 females in the choir. If each musician only participates in one group, how many musicians total are there in the orchestra, the band, and the choir? The number of musicians in the orchestra is 11 + 12 = <<11+12=23>>23. The number of musicians in the band is 2 × 23 = <<2*23=46>>46. The number of students in the choir is 12 + 17 = <<12+17=29>>29. There are 23 + 46 + 29 = <<23+46+29=98>>98 musicians in total. #### 98 At the feline sanctuary, there were 12 lions, 14 tigers, and several cougars. If there were half as many cougars as lions and tigers combined, then what was the total number of big cats at the feline sanctuary? Half as many cougars as lions and tigers combined is (12+14)/2=13. Then the total number of big cats at the feline sanctuary is 12+14+13=<<12+14+13=39>>39. #### 39 Deborah has four letters to mail. Standard postage is $1.08 per letter, with an additional charge for international mail. Deborah is mailing two letters internationally, and she is paying $4.60 to mail four letters. How many cents is the additional charge per letter for international shipping? A dollar is 100 cents, so standard postage is 108 cents. Deborah’s four letters cost 108 * 4 = <<108*4=432>>432 cents for standard postage. She paid 460 - 432 = <<460-432=28>>28 cents for international shipping on two letters. Thus, the additional international shipping charge is 28 / 2 = <<28/2=14>>14 cents per letter. #### 14 April went to a concert that has two bands. 2/3 of the audience was there for the second band and 1/3 was there for the first band. 50% of the audience there for the second band is under the age of 30. Of this group, 60% are women and there are 20 men. How many people are at the concert? Of the under-30s there for the second band, 40% are men because 100-60 = <<100-60=40>>40 There are fifty under-30s there for the second band because 20 / .4 = <<20/.4=50>>50 There are 100 people there to see the second band because 50 / .5 = <<50/.5=100>>100 There are 150 people at the concert because 100 / (2/3) = <<100/(2/3)=150>>150 #### 150 Bert made 12 sandwiches for his trip. On the first day, he ate half of the sandwiches he made. The next day he ate 2 sandwiches less. How many sandwiches does Bert have left after these two days? On the first day, Bert ate 12 / 2 = <<12/2=6>>6 sandwiches. The second day he ate 6 - 2 = <<6-2=4>>4 sandwiches. So in total Bert is left with 12 - 6 - 4 = <<12-6-4=2>>2 sandwiches. #### 2 There are 50 passengers on a bus. At the first stop, 16 more passengers get on the bus. On the other stops, 22 passengers get off the bus and 5 passengers more get on the bus. How many passengers are there on the bus in total at the last station? There are 50+16=<<50+16=66>>66 passengers at first. Then 66 - 22 = <<66-22=44>>44 passengers remain. Since 5 more passengers get on the bus there are 44 + 5 = <<44+5=49>>49 passengers on the bus. #### 49 Mr Castiel prepared 600 boar sausages on the weekend. He ate 2/5 of them on Monday, half of the remaining on Tuesday and saved the rest for Friday. If he ate 3/4 of the remaining boar sausages on Friday, how many sausages are left? On Monday, Mr Castiel ate 2/5*600 = <<2/5*600=240>>240 sausages. The remaining number of sausages after he ate 240 on Monday is 600-240 = <<600-240=360>>360 On Tuesday, he ate half of the remaining sausages, a total of 360/2 = <<360/2=180>>180. The remaining number of sausages that he saved for Friday after eating 180 on Tuesday is 360-180 = <<360-180=180>>180. On Friday, Mr Castiel ate 3/4*180 = <<3/4*180=135>>135 of the sausages he had kept. The remaining number of sausages after he ate 135 on Friday is 180-135 = <<180-135=45>>45 #### 45 Michael has $42. Michael gives away half the money to his brother. His brother then buys 3 dollars worth of candy. If his brother has $35 left, how much money, in dollars, did his brother have at first? Michael gives away 42/2=<<42/2=21>>21 dollars. Before buying candy, his brother has 35+3=<<35+3=38>>38 dollars. His brother had 38-21=<<38-21=17>>17 dollars at first. #### 17