Grandma Olga has 3 daughters and 3 sons. If all her daughters each have 6 sons, and each of her sons has 5 daughters, how many grandchildren does she have in total?

From her daughters, Olga has 3 x 6 =

<<3*6=18>>18 grandsons. From her sons, she has 3 x 5 = <<3*5=15>>15 granddaughters. Altogether, Olga has 18 + 15 = <<18+15=33>>33 grandchildren. #### 33 Cary is saving money to buy a new pair of shoes that cost $120. He has already saved $30. He earns $5 for every lawn he mows. If he mows 3 lawns each weekend, how many more weekends will he have to mow lawns before he can afford to buy the shoes? Cary needs to save an additional $120 - $30 = $<<120-30=90>>90. Cary makes $5 * 3 = $<<5*3=15>>15 each weekend. It will take 90 / 15 = <<90/15=6>>6 more weekends to save enough money to afford the shoes. #### 6 Galileo is currently renting a car that costs $20 per month. He is planning to buy a brand new car that costs $30 per month. If Galileo will have to pay for the new car for a year, how much will be the difference if he gets the brand new car instead of renting a car? Galileo pays $20 x 12 = $<<20*12=240>>240 for renting a car every year. He will pay $30 x 12 = $<<30*12=360>>360 for the brand new car for a year. Therefore the difference between a new car and a refurbished car is $360 - $240 = $<<360-240=120>>120. #### 120 Tim has 22 cans of soda. Jeff comes by, and takes 6 cans of soda from Tim. Tim then goes and buys another half the amount of soda cans he had left. How many cans of soda does Tim have in the end? After Jeff comes by, Tim has 22-6=<<22-6=16>>16 cans left. Tim buys 16/2=<<16/2=8>>8 more cans. Tim has 16+8=<<16+8=24>>24 cans in the end. #### 24 Casey takes 6 hours to complete a marathon race, while Zendaya takes 1/3 times longer to cover the same distance. What is the average time the two take to complete to race? Zendaya takes 1/3 * 6 hours = <<1/3*6=2>>2 hours longer to complete the marathon. To complete the marathon, Zendaya takes 6 hours + 2 hours = <<6+2=8>>8 hours The combined time the two take to complete the marathon is 8 hours + 6 hours = <<8+6=14>>14 hours The average number of hours Casey and Zendaya take to complete the marathon is 14 hours / 2 people = <<14/2=7>>7 hours/person. #### 7 A town council began the decade by planting cherry trees around the neighborhood to make the neighborhood look more welcoming. By the end of the decade, they have planted twice as many cherry trees as they originally planned and have now realized that falling cherry blossom leaves are causing a problem. Each tree drops 100 leaves each during the fall. If the town council originally intended to plant 7 cherry trees, how many leaves now fall from the trees? The council planted twice their goal so there is a total of 7 planned cherry trees * 2 = <<7*2=14>>14 cherry trees. So there must be 14 cherry trees * 100 leaves falling from each tree = <<14*100=1400>>1400 leaves. #### 1400 There are 8 men at a yoga studio with an average weight of 190 pounds and 6 women with an average weight of 120 pounds. What is the average weight of all 14 men and women? The total weight for the 8 men is 8 men * 190 pounds per man = <<8*190=1520>>1520 pounds The total weight for the 6 women is 6 women * 120 pounds per woman = <<6*120=720>>720 pounds The total weight for 14 men and women is 1520 pounds + 720 pounds = <<1520+720=2240>>2240 pounds The average weight per person is 2240 pounds / 14 men and women = <<2240/14=160>>160 pounds #### 160 Dany owns a farm, in his farm he has 4 cows and 3 sheep that eat 2 bushels a day. He also has 7 chickens that eat 3 bushels a day. How many bushels should he have to suffice the animals for a day? Dany has to have 4 x 2 = <<4*2=8>>8 bushels a day for the cows. He has to have 3 x 2 = <<3*2=6>>6 bushels a day for the sheep. And he also has to have 7 x 3 = <<7*3=21>>21 bushels a day for the chickens. Therefore, Dany has to have 8 + 6 + 21 = <<8+6+21=35>>35 bushels to suffice the animals for a day. #### 35 Heidi's apartment has 3 times as many rooms as Danielle's apartment. Grant's apartment has 1/9 as many rooms as Heidi's apartment. If Grant's apartment has 2 rooms, how many rooms does Danielle's apartment have? Heidi's apartment has 2*9=<<2*9=18>>18 rooms. Danielle's apartment has 18/3=<<18/3=6>>6 rooms. #### 6 Dr. Harry wants to know how many candies Susan consumed during the week. Susan tells him she bought 3 on Tuesday, 5 on Thursday, 2 on Friday. If she has only 4 of them left, how many did she eat? She had bought 3+5+2 = <<3+5+2=10>>10 candies over the week She has only 4 left which means she ate 10-4 = <<10-4=6>>6 candies during the week #### 6