There are 20 dolphins in the aqua park. One-fourth of the dolphins are fully trained. Two-third of the remaining dolphins are currently in training and the rest will be trained next month. How many dolphins will be trained next month?

20 x 1/4 =

<<20*1/4=5>>5 dolphins are fully trained. So, 20 - 5 = <<20-5=15>>15 dolphins are not yet fully trained. 15 x 2/3 = <<15*2/3=10>>10 are currently in training. Therefore, 15 - 10 = <<15-10=5>>5 dolphins will be trained next month. #### 5 Elida has 5 letters while Adrianna has 2 less than twice the number of letters Elida has. What's 10 times the average number of letters in both names? Twice the number of letters Elida has is 2*5=<<2*5=10>>10 2 less than twice the number of letters Elida has is 10-2=8 The total number of letter in both names is 8+5=<<8+5=13>>13 The average number of letters in the name Elida and Adrianna is 13/2=<<13/2=6.5>>6.5 10 times the average number of letters in both names is 10*6.5 = <<10*6.5=65>>65 #### 65 A school bus traveled for 42 minutes at a speed of 50 mph. What is the distance the bus traveled in miles? 1 hour = <<60=60>>60 minutes. We convert the time to hours, so 42 minutes = 42/60 hours = 7/10 hours. So in 42 minutes, the distance the bus traveled in miles is 50 * (7/10) = <<50*(7/10)=35>>35 miles. #### 35 Stephanie is checking her household budget, and needs to calculate how much she has left to pay for her bills. Her electricity bill costs $60, and this is paid in full. Her gas bill was $40, and she has already paid three-quarters of this. She makes another payment of $5 towards her gas bill while checking her budget. Her water bill is $40, which she has paid half of, and her internet bill is $25, which she has made 4 payments of $5 towards. Overall, how many dollars does Stephanie still need to pay to finish paying her bills? Stephanie has paid three-quarters of her gas bill, which is 40 * 0.75 = $<<40*0.75=30>>30. She then made another payment, which means she has paid 30 + 5 =$<<30+5=35>>35 of her gas bill. She has paid half of her water bill, which is 40 * 0.5 = $<<40*0.5=20>>20. She has made 4 payments towards her internet bill, which is a total of 4 * 5 = $<<4*5=20>>20. Overall, her bills were 60 + 40 + 40 + 25 = $<<60+40+40+25=165>>165. Overall, she has made payments of 60 + 35 + 20 + 20 = $<<60+35+20+20=135>>135. Therefore, she still has to pay 165 – 135 = $<<165-135=30>>30. #### 30 Otto’s local kitchen supply store charges $5.00 for the first knife that you need sharpened. They charge $4.00 for the next 3 knives and $3.00 for any knife after that. If Otto has 9 knives that need to be sharpened, how much will it cost to sharpen his knives? Knives 2, 3 & 4 will cost $4.00 each to sharpen so that’s 3*4 = $12.00 Knives 5-9 will cost $3.00 each to sharpen so that’s 5*3 = $<<5*3=15.00>>15.00 The first knife will cost $5.00, the next 3 cost $12.00 and the rest cost $15.00 for a total of 5+12+15 = $<<5+12+15=32.00>>32.00 #### 32 Jackson wants to go on a shopping spree, so his mom says she will give him some spending money if he does extra chores. She promises $5 per hour spent on chores. Jackson spends 2 hours vacuuming, and decides to do this twice. He also spends 0.5 hours washing dishes, and three times as long cleaning the bathroom. How much spending money has Jackson earned? Jackson spent a total of 2 * 2 = <<2*2=4>>4 hours vacuuming. This means he earned 4 * $5 = <<4*5=20>>20 dollars from vacuuming. He earned 0.5 * $5 = <<0.5*5=2.5>>2.5 dollars from washing dishes. Cleaning the bathroom took three times as long as the dishes, so he spent 0.5 * 3 = <<0.5*3=1.5>>1.5 hours in the bathroom. This means he earned 1.5 * $5 = $<<1.5*5=7.5>>7.5 from cleaning the bathroom. In total, he has earned $20 + $2.5 + $7.5 = $<<20+2.5+7.5=30>>30. #### 30 The rainy season is here, Jan collected 65 gallons of water in a barrel outside her home. She uses 7 gallons of water each to clean the two cars and uses 11 fewer gallons than the two cars to water the plants. Then, she uses half of the remaining gallons of water to wash the plates and clothes. How many gallons of water does Jan use to wash her plates and clothes? She uses 7 x 2 = <<7*2=14>>14 gallons of water to clean the two cars. She uses 14 - 11 = <<14-11=3>>3 gallons of water to water the plants. The total gallons of water that she uses to clean the cars and to water the plants is 14 + 3 = <<14+3=17>>17. Jan has 65 - 17 = <<65-17=48>>48 gallons of water remaining after cleaning the cars and watering the plants. Jan uses 48 / 2 = <<48/2=24>>24 gallons of water to wash her plates and clothes. #### 24 Iris went to the mall to buy clothes. She bought three jackets at $10 each, two pairs of shorts at $6 each, and four pairs of pants at $12 each. How much did she spend in all? Three jackets cost 3 x $10 = $<<3*10=30>>30. Two pairs of shorts cost 2 x $6 = $<<2*6=12>>12. And, four pairs of pants cost 4 x $12 = $<<4*12=48>>48. Therefore, Iris spent $30 + $12 + $48 = $<<30+12+48=90>>90. #### 90 A band's members each earn $20 per gig. If there are 4 members and they've earned $400, how many gigs have they played? The band earns $80 per gig because 4 x 20 = <<4*20=80>>80 They played 5 gigs because 400 / 80 = <<400/80=5>>5 #### 5 James works for 240 minutes. He takes a water break every 20 minutes and a sitting break every 120 minutes. How many more water breaks does he take than sitting breaks? First find the number of water breaks James takes: 240 minutes / 20 minutes/water break = <<240/20=12>>12 water breaks Then find the number of sitting breaks James takes: 240 minutes / 120 minutes/sitting break = <<240/120=2>>2 sitting breaks Then subtract the number of sitting breaks from the number of water breaks to find the difference: 12 breaks - 2 breaks = <<12-2=10>>10 breaks #### 10