Ali had a collection of seashells. He started with 180 seashells. He then gave away 40 seashells to his friends. He also gave 30 seashells to his brothers. If he sold half of the remaining seashells, how many seashells did he have left?

When he gave 40 seashells to his friends, Ali had 180-40=

<<180-40=140>>140 seashells. When he gave another 30 seashells to his brothers, he had 140-30 = <<140-30=110>>110 seashells He also sold half of the seashells, a total of 1/2*110 = <<55=55>>55 seashells He was left with 110-55= <<110-55=55>>55 seashells #### 55 Studying for her test, Mitchell had read ten chapters of a book before 4 o'clock. When it clocked 4, Mitchell had read 20 pages of the 11th chapter of the book she was studying from. After 4 o'clock, she didn't read the remaining pages of chapter eleven but proceeded and read 2 more chapters of the book. If each chapter in the book had 40 pages, calculate the total number of pages that Mitchell had read altogether? Since each chapter of the book has 40 pages, Mitchell had read 10*40 = <<10*40=400>>400 pages from the first ten chapters. After reading 20 pages of the eleventh chapter, the total number of pages that Mitchell had read is 400+20 = <<400+20=420>>420 The next two chapters that she read had 2*40 = <<2*40=80>>80 pages. In total, Mitchell read 420+80 = <<420+80=500>>500 pages of the book that day. #### 500 James buys 5 packs of beef that are 4 pounds each. The price of beef is $5.50 per pound. How much did he pay? He bought 5*4=<<5*4=20>>20 pounds of beef So he paid 20*5.5=$<<20*5.5=110>>110 #### 110 There are 40 students in a class. If 1/10 are absent, 3/4 of the students who are present are in the classroom, and the rest are in the canteen, how many students are in the canteen? Out of the 40, 40 x 1/10 = <<40*1/10=4>>4 students are absent. So, 40 - 4 = <<40-4=36>>36 students are present in school. Out of the 36, 36 x 3/4 = <<36*3/4=27>>27 students are in the classroom. This means, 36 - 27 = <<36-27=9>>9 students are in the canteen. #### 9 A couple with two children, ages 6 and 10 years old, decided to go to an amusement park. The regular ticket costs $109, but children below 12 years old have a $5 discount. If they gave the cashier $500, how much change will they receive? The ticket costs 109 - 5 = $<<109-5=104>>104 for each child. So the ticket cost of the two children is 104 x 2 = $<<104*2=208>>208. The couple needs to pay the regular price, so it's 109 x 2 = $<<109*2=218>>218. Thus, the family needs to pay a total of 208 + 218 = $<<208+218=426>>426. Therefore, their change is 500 - 426 = $<<500-426=74>>74. #### 74 Kennedy's house is 600 square feet larger than 4 times Benedict's house. If Kennedy's house is 10000 square feet, how many square feet is Benedict's house? Let the number of square feet in Benedict's house be x. So, we can write the equation 4 * x + 600 = 10000. Subtracting 600 from both sides we get 4 * x = 9400 Dividing both sides by 4 we get x = 2350 square feet. #### 2350 Loraine makes wax sculptures of animals. Large animals take four sticks of wax and small animals take two sticks. She made three times as many small animals as large animals, and she used 12 sticks of wax for small animals. How many sticks of wax did Loraine use to make all the animals? Loraine made 12 / 2 = <<12/2=6>>6 small animals. She made 6 / 3 = <<6/3=2>>2 large animals. She used 2 * 4 = <<2*4=8>>8 sticks of wax on large animals. Therefore, Loraine used 12 + 8 = <<12+8=20>>20 sticks of wax for all the animals. #### 20 3 families of 4 people shared a vacation rental for 7 days. Everyone uses 1 oversized beach towel a day before getting a new one. The washing machine can hold 14 oversized beach towels per load. How many loads of laundry will it take to wash all the oversized beach towels? There are 3 families of 4 meaning there are 3*4 =<<3*4=12>>12 people in the vacation rental They all use 1 oversized beach towel a day so they use 1*12 = <<1*12=12>>12 towels a day They use 12 towels a day for 7 days so in one week they use 12*7 = <<12*7=84>>84 beach towels The washing machine can only hold 14 towels and they have 84 towels to wash which means there are 84/14 =<<84/14=6>>6 loads of laundry #### 6 A gallon of whole milk that normally costs $3 is now sold at $2. A box of cereal was sold at a discount of $1. How much will you save via discounts if you buy 3 gallons of whole milk and 5 boxes of cereal? The discount for each gallon of whole milk is $3 - $2 = $<<3-2=1>>1. So the discount for 3 gallons of whole milk is $1/gallon x 3 gallons = $<<1*3=3>>3. The total discount for 5 boxes of cereal is $1/box x 5 boxes = $<<1*5=5>>5. You will save $3 + $5 = $<<3+5=8>>8 for 3 gallons of whole milk and 5 boxes of cereal. #### 8 Janice's office is on the third floor, and she has to walk up 3 flights of stairs to get to her office. In a single day, she goes up the three flights of stairs 5 times, down the the three flights of stairs 3 times, and uses the elevator the remainder of the time. How many flights of stairs does Janice walk (up and down) in a single day? Janice walks up 3 flights of stairs 5 times per day, for a total of 3*5 = <<3*5=15>>15 flights of stairs Janice walks down 3 flights of stairs 3 times per day, for a total of 3*3 = <<3*3=9>>9 flights of stairs In total, she walks 15+9=<<15+9=24>>24 flights of stairs in a single day #### 24