On a construction site, a mason has to build 6 courses of a wall, each having 10 bricks per course. He has to build 4 such walls and realized he won't be able to finish two courses of the last wall because there were not enough bricks. What's the total number of bricks that he has used?

If he has to build 4 walls, each having 6 courses, the total number of courses to be built is 4 * 6 =

<<4*6=24>>24 courses. If each course has 10 bricks, then the total of bricks for the courses is 24 * 10 = <<24*10=240>>240 bricks. The total number of bricks missing to finish the last wall is 2 * 10 = <<2*10=20>>20 bricks. The total number of used bricks is 240 - 20 = <<240-20=220>>220 bricks. #### 220 Jane is dividing up minnows to be carnival prizes. She bought 600 minnows, and each prize is a bowl with 3 minnows. If 800 people are going to play the game and 15% win a prize, how many minnows will be left over? First find the number of people that win a prize: 800 people * 15% = <<800*15*.01=120>>120 people Then multiply that number by the number of minnows each person wins: 120 people * 3 minnows/person = <<120*3=360>>360 minnows Then subtract that number of minnows won from the starting number to find the number that are left: 600 minnows - 360 minnows = <<600-360=240>>240 minnows #### 240 The average speed for an hour drive is 66 miles per hour. If Felix wanted to drive twice as fast for 4 hours, how many miles will he cover? If Felix drives twice as fast, he will be covering 2*66 = <<2*66=132>>132 miles per hour. In four hours, driving at 132 miles per hour, since distance=speed*time, Felix will cover 132*4 = <<132*4=528>>528 miles. #### 528 A magician has a top hat with 20 red marbles and a top hat with 30 blue marbles. If he takes away 3 red marbles and four times as many blue marbles as red marbles (without looking), how many marbles in total does he have left? He had 20 red marbles and took away 3 leaving 20-3 = <<20-3=17>>17 red marbles He took 4 times as many blue marbles as red marbles which is 4*3 = <<4*3=12>>12 blue marbles He took 12 blue marbles from 30 leaving 30-12 = 18 blue marbles He now has 17+18 = <<17+18=35>>35 marbles left #### 35 The bakery makes 3 batches of baguettes a day. Each batch has 48 baguettes. After the first batch came out, he sold 37. After the second batch, he sold 52. After the third batch he sold 49. How many baguettes are left? He makes 3 batches of baguettes a day, 48 per batch so he makes 3*48 = <<3*48=144>>144 He sells 37, then 52 then 49 baguettes for a total of 37+52+49 = <<37+52+49=138>>138 He had 144 to sell and he sold 138 so he has 144-138 = <<144-138=6>>6 left over #### 6 Cindy had 20 marbles which is 5 more than what Lisa had. If Cindy gave her 12 marbles, how many more marbles does Lisa have now? Lisa had 20 - 5 = <<20-5=15>>15 marbles. Since Cindy gave 12 marbles, then she only has 20 - 12 = <<20-12=8>>8 marbles left. Since Lisa received 12 marbles, then Lisa has 15 + 12 = 27 marbles now. Hence, Lisa has 27 - 8 = <<27-8=19>>19 marbles more than Cindy. #### 19 There are 30 students in the general study hall and twice as many students in the biology hall as there are in the general study hall. If the number of students in the math hall is 3/5 times as many as the combined total number of students in the general study hall and the biology hall combined, calculate the total number of students in all the halls combined. The number of students in the biology hall is twice the number of students in the general hall, meaning there are 2*30 = <<2*30=60>>60 students in the biology hall. The total number of students in the biology hall and general study hall is 60+30 = <<60+30=90>>90 students. If there are 3/5 times as many students in the maths hall as there are in the general study hall and biology hall, their number is 3/5*90=<<3/5*90=54>>54 students in the maths hall. The total number of students in the three halls is 54+90 = <<54+90=144>>144 students #### 144 In a school garden, there are flowers in different colors. In total there are 96 flowers of four colors: green, red, blue, and yellow. There are 9 green flowers and three times more red flowers. Blue flowers make up to 50% of the total flower count. How many yellow flowers are there? There are 3 * 9 = <<3*9=27>>27 red flowers. 50/100 * 96 = <<50/100*96=48>>48 flowers are blue. Knowing that, there are 96 - 48 - 27 - 9 = <<96-48-27-9=12>>12 yellow flowers in a school's garden. #### 12 Nellie went to a big family party. She played with all the other kids there. She played hide and seek with her 6 sisters and her 8 brothers. Then, she played tag with all 22 of her cousins. How many kids did she play with in all? Nellie played hide and seek with 6 + 8 = <<6+8=14>>14 kids. In all, Nellie played with 14 + 22 = <<14+22=36>>36 kids. #### 36 Maddie went to a beauty store and bought some beauty products. She bought 3 different makeup palettes which cost $15 each, 4 lipsticks which cost $2.50, and 3 boxes of hair color which cost $4 each. How much did Maddie pay in total? She paid 3 x $15 = $<<3*15=45>>45 for the makeup palettes. She paid 4 x $2.50 = $<<4*2.5=10>>10 for the lipsticks. She also paid 3 x $4 = $<<3*4=12>>12 for the boxes of hair color. Therefore, Maddie paid a total of $45 + $10 + $12 = $<<45+10+12=67>>67 for the beauty products. #### 67