Mark wants to set the record for most consecutive ropes jumped. The record is 54,000. He can jump 3 times a second. How many hours would he need to jump rope?

He can jump 3*60=

<<3*60=180>>180 times per minute So he can jump 180*60=<<180*60=10800>>10,800 per hour So it would take him 54,000/10,800=<<54000/10800=5>>5 hours #### 5 Max has 8 children and each of his children has the same number of children as he does except for 2 who have 5 children each. How many grandchildren does he have? Out of his 8 children, 2 have only 5 children so the rest who have 8 ( the same number as him) are 8-2 = <<8-2=6>>6 6 of Max's children have 8 children each for a total of 6*8 = <<6*8=48>>48 grandchildren 2 of Max's children have 5 children each for a total of 5*2 = <<5*2=10>>10 grandchildren In total he has 48+10 = <<48+10=58>>58 grandchildren #### 58 Uncle Jude baked 256 cookies. He gave 15 cookies to Tim, 23 cookies to Mike, kept some in the fridge and gave the rest to Anna. How many cookies did he put in the fridge if he gave twice as many cookies as he gave Tim to Anna? He gave twice 15 cookies to Anna which is 2*15 = <<2*15=30>>30 cookies He gave out a total of 15+23+30 = <<15+23+30=68>>68 cookies The remainder in the fridge is 256-68 = <<256-68=188>>188 cookies #### 188 Ryan has 40 balls. There are twice as many red balls as blue while the rest are green. If there are 11 blue balls, how many green balls are there? There are 11 blue x 2 red/blue = <<11*2=22>>22 red balls. The total number of blue and red balls is 11 blue + 22 red = <<11+22=33>>33 balls There are 40 balls - 33 balls = <<40-33=7>>7 green balls. #### 7 John drinks 2 energy drinks. 1 of them is a 12-ounce drink with 250 grams of caffeine. The second drink is 3 times more caffeinated per ounce but only 2 ounces. He then takes a caffeine pill that has as much caffeine as his 2 drinks combined. How much caffeine did he consume? The second drink was 2/12=1/6 the size of the first drink So it had 1/6*3=1/2 the caffeine That means it had 1/2*250=<<250/2=125>>125 grams of caffeine So the total amount of caffeine he drank was 125+250=<<125+250=375>>375 grams So he consumed 375*2=<<375*2=750>>750 grams of caffeine for the day #### 750 Bert's golden retriever has grown tremendously since it was a puppy. At 7 weeks old, the puppy weighed 6 pounds, but doubled in weight by week 9. It doubled in weight again at 3 months old, and doubled again at 5 months old. Finally, the dog reached its final adult weight by adding another 30 pounds by the time it was one year old. What is the dog's full adult weight, in pounds? At 7 weeks old, the puppy weighed 6 pounds, but doubled in weight by week 9 to reach a weight of 6*2=<<6+6=12>>12 pounds. It doubled in weight again at 3 months old to reach a weight of 12*2=<<12*2=24>>24 pounds. It doubled in weight again at 5 months old to reach a weight of 24*2=<<24*2=48>>48 pounds. And it reached its full adult weight by adding another 30 lbs to reach a final weight of 48+30=78 pounds. #### 78 In mid-May, the river flowing through Moreland is five feet deep. By mid-June, the river is 10 feet deeper than mid-May. By mid-July, the river is three times deeper than mid-June. How many feet deep is the river by mid-July? In mid-June, the river is 5+10=<<5+10=15>>15 feet deep. In mid-July, the river is 15*3=<<15*3=45>>45 feet deep. #### 45 Jim buys a package of 20 car washes. Since He bought a package he only has to pay 60%. A carwash normally costs 15 dollars. How much did he pay for the package? He had to pay for 20*.6=<<20*.6=12>>12 car washes That means he had to pay 12*15=$<<12*15=180>>180 #### 180 Ken had fifty pencils, and he wanted to share some of them with his two friends, Manny and Nilo. Ken gave ten pencils to Manny and ten more pencils to Nilo than he gave to Manny. He kept the rest of the pencils. How many pencils did Ken keep? Nilo received 10 + 10 = <<10+10=20>>20. Thus, Ken gave a total of 10 + 20 = <<10+20=30>>30. Therefore, Ken kept 50 - 30 = <<50-30=20>>20 pencils. #### 20 Kenny played 10 hours of basketball last week. He ran for twice as long as he played basketball, and he practiced on the trumpet for twice as long as he ran. How many hours did Kenny practice on the trumpet last week? Kenny ran for 10*2=<<10*2=20>>20 hours. Kenny practiced the trumpet for 20*2=<<20*2=40>>40 hours. #### 40