Question: 40 less than 10 times Diaz's age is 20 more than 10 times Sierra's age. If Sierra is currently 30 years old, how old will Diaz be 20 years from now?
Answer: If Sierra is currently 30 years old, 10 times her age is 30 * 10 = 300. Twenty more than 10 times Sierra's age is 300 + 20 = 320. 320 is 40 less than ten times Diaz's age so 10 times Diaz's age is 320 + 40 = 360. If ten times Diaz's age is 360, Diaz is 360 / 10 = 36 years old. Twenty years from now, Diaz will be 20 + 36 = 56 years old. The answer is 56.
[Question]Tiffany is going to the beach and wants to make sure she has enough sunscreen. She knows she needs to re-apply sunscreen after 2 hours. She also knows she needs 3 ounces of sunscreen each application and a bottle contain 12 ounces and costs $3.5. If she is there for 16 hours, how much will the sunscreen cost?
[Answer]She needs to apply sunscreen 8 times because 16 / 2 = 8. She will use 24 ounces of sunscreen because 3 x 8 = 24. This will take 2 bottles because 24 / 12 = 2. This will cost $7 because 2 x 3.5 = 7. The answer is 7.
Q: McKenna has 34 stuffed animals. Kenley has twice as many as McKenna. Tenly has 5 more than Kenley . How many stuffed animals do the three girls have in all?
A: Kenley has 2 * 34 stuffed animals = 68 stuffed animals. Tenly has 68 stuffed animals + 5 = 73 stuffed animals. The three girls total had 34 + 68 + 73 = 175 stuffed animals. The answer is 175.
Question: For every 100 additional people that board a spaceship, its speed is halved. If the speed of the spaceship with 200 people on board is 500km per hour, what is its speed in km/hr when there are 400 people on board?
Answer: For every addition of 100 people added the speed is halved so for the first 100 people added its speed is 1 / 2 * 500 km / hr = 250 km / hr. For another addition of 100 people its speed is also halved, 1 / 2 * 250 km / hr = 125 km / hr. So for the total of 200 additional people, its speed is 125 km / hr. The answer is 125.
[Question]There are 30 spaces for each vehicle in a parking lot. A caravan takes up a total of 2 spaces of parking space. How many vehicles can still park if there are 3 caravans currently parking?
[Answer]The three caravans used up 3x2 = 6 parking spaces in the parking lot. Therefore, 30 - 6 = 24 vehicles can still park in the parking lot. The answer is 24.
[Question]A gecko eats 70 crickets every three days. The first day she eats 30% of the crickets. The second day she eats 6 less than the first, and the third day she finishes up the remaining crickets. How many crickets does she eat on the third day?
[Answer]
Day 1:70(.30) = 21 crickets. Day 2:21 - 6 = 15 crickets. Day 3:70 - 21 - 15 = 34 crickets. The answer is 34.