Stefan, Vail, and Aiguo collected seashells. Stefan had 16 more seashells than Vail. Vail had 5 less than Aiguo. Aiguo had 20 seashells. How many seashells did the 3 children have in total?

How many seashells did Aiguo have? ** Aiguo =

<<20=20>>20 shells How many seashells did Vail have? ** Vail = 20 - 5 = <<20-5=15>>15 shells How many seashells did Stefan have? ** Stefan = 15 + 16 = <<15+16=31>>31 shells How many seashells did the 3 children have? ** Total = 20 + 15 + 31 = <<20+15+31=66>>66 How many seashells did the 3 children have in total? ** The 3 children had 66 seashells altogether. #### 66 A store is selling mobile phones. This store contains 20 units of phones but the owner found out that there were 5 defective units. After he got rid of the defective units, he started to sell the rest of his units to customer A who bought 3 units, customer B who bought a certain amount of units, and customer C who bought 7 units. In the end, all non-defective units were sold. How many units were sold to Customer B? How many units were non-defective? ** There were 20 - 5 = <<20-5=15>>15 units of non-defective smartphones. How many units were sold to customers A and C? ** There were 3 + 7 = <<3+7=10>>10 units sold to customers A and C. How many units were sold to customer B? ** So, 15 - 10 = <<15-10=5>>5 units were sold to customer B. #### 5 Marianne was 20 years old when Bella was 8 years old. How old will Marianne be when Bella turns 18? How old is Marianne? ** Marianne is 20 - 8 = <<20-8=12>>12 years older than Bella. How old will Bella be when she turns 18? ** Bella will turn 18 in 18 - 8 = <<18-8=10>>10 years. How old will Marianne be when Bella turns 18? ** So, Marianne will be 20 + 10 = <<20+10=30>>30 years old then. #### 30 Brianna started out with a bag of 24 marbles. She lost four marbles through a hole in the bag. Then, she gave away twice as many marbles as she had lost through the hole in the bag. Finally, her dog ate half as many marbles as Brianna had lost through the hole in the bag. How many marbles did Brianna have remaining? How many marbles did Brianna give away? ** Brianna gave away twice as many marbles as she had lost, or a total of 2*4=<<2*4=8>>8 marbles. How many marbles did Brianna's dog eat? ** Her dog ate half as many marbles as Brianna had lost through the hole in the bag, or 4/2=<<4/2=2>>2 marbles. How many marbles did Brianna have remaining? ** If she started with 24 marbles, then the number of marbles remaining is 24-4-8-2=<<24-4-8-2=10>>10 marbles. #### 10 Claire is scheduling her day. She has four hours to clean and two hours to cook, then divides the rest of her working day equally between crafting and tailoring. She then sleeps eight hours. If all of this takes place within one day, how many hours did Claire spend crafting? How many hours did Claire spend crafting? ** We know Claire has spent a total of 24 hours in a day - 4 hours cleaning - 2 hours cooking - 8 hours sleeping = 10 hours crafting and tailoring. How many hours did Claire spend crafting? ** Since she split her time equally, she must have spent 10 hours * 0.5 = <<10*0.5=5>>5 hours crafting. #### 5 Martha has 18 crayons. She lost half of them, so she bought a new set of 20 crayons. How many crayons in total does Martha have after the purchase? How many crayons did Martha lose? ** In the beginning, Martha lost 18 / 2 = <<18/2=9>>9 crayons. How many crayons in total does Martha have after the purchase? ** So after she bought a set of new crayons, she has in total 9 + 20 = <<9+20=29>>29 crayons. #### 29 Bailey bought 8 dog treats and an additional 2 chew toys. She also got 10 more rawhide bones. Sadly, she forgot her money and had to split the charges equally across 4 credit cards. How many items were included in each charge? How many dog supplies did Bailey get? ** Bailey got 8+2=<<8+2=10>>10 dog supplies. How many dog supplies did Bailey get? ** After adding the rawhide bones, she had 10+10=<<10+10=20>>20 dog supplies. How many items were included in each charge? ** She needed to split the charges across 4 cards, so each charge had 20*.25 = <<20*.25=5>>5 items. #### 5 Carter has a jar with 20 green M&Ms and 20 red M&Ms. He eats 12 of the green M&Ms, then his sister comes and eats half the red M&Ms and adds 14 yellow M&Ms. If Carter picks an M&M at random now, what is the percentage chance he'll get a green M&M? How many green M&Ms are there after Carter eats 12? ** First find the final number of green M&Ms by subtracting 12 from the starting number: 20 M&Ms - 12 M&Ms = <<20-12=8>>8 green M&Ms How many red M&Ms are there after Carter's sister eats 14? ** Then find the final number of red M&Ms by dividing the starting number by half: 20 M&Ms / 2 = <<20/2=10>>10 red M&Ms How many M&Ms are there at the end? ** Then find the total number of M&Ms at the end by adding the number of red, green and yellow M&Ms: 8 M&Ms + 10 M&Ms + 14 M&Ms = <<8+10+14=32>>32 M&Ms What is the percentage chance Carter gets a green M&M? ** Then divide the number of green M&Ms by the total number of M&Ms and multiply by 100 to find the percentage chance Carter gets a green M&M: 8 M&Ms / 32 M&Ms * 100 = <<8/32*100=25>>25% #### 25 James is running a fundraiser selling candy bars. Each box has 10 candy bars in it. He sells 5 boxes. He sells each candy bar for $1.50 and buys each bar for $1. How much profit does he make from these sales? How much does he make from each candy bar? ** He makes 1.5-1=$<<1.5-1=.5>>.5 from each candy bar How many candy bars does he sell? ** He sells 5*10=<<5*10=50>>50 candy bars How much does he make from selling the candy bars? ** So he makes 50*.5=$<<50*.5=25>>25 #### 25 Emily is 20 years old and her older sister, Rachel, is 24 years old. How old is Rachel when Emily is half her age? How old is Rachel when Emily is half her age? ** The difference in age between the two sisters is 24 - 20 = <<24-20=4>>4 years. How old is Rachel when Emily is half her age? ** When Rachel is twice Emily’s age, she is 4 x 2 = <<2*4=8>>8 years old. #### 8