A store ordered 300 more than twice as many pens as it did pencils at $5 each. If the cost of a pencil was $4, and the store ordered 15 boxes, each having 80 pencils, calculate the total amount of money they paid for the stationery.
Let's think: If the store ordered 15 boxes, each having 80 pencils, they ordered 15 * 80 = 1200 pencils. If the cost of a pencil was $4, the store paid $4 * 1200 = $4800 for all the pencils. Twice as many pens as pencils that the store ordered are 2 * 1200 = 2400. If A store ordered 300 more than twice as many pens as it did pencils, it ordered 2400 + 300 = 2700 pencils. Since the cost of the pens was $5, the store paid 2700 * $5 = $13500 for the pens. The total amount of money they paid for the stationery is 13500 + 4800 = $18300.. The answer is: 18300.

Ginger is weaving mats out of colored straw. Each mat takes 20 red straws, 30 orange straws, and half as many green straws as orange straws. How many straws does she need to make 10 mats?
Let's think: First find the number of green straws each mat needs: 30 orange straws / 2 orange straws / green straw = 15 green straws. Then find the total number of straws in each mat: 15 straws + 20 straws + 30 straws = 65 straws. Then multiply that number by the number of mats to find the total number of straws Ginger needs: 65 straws / mat * 10 mats = 650 straws.. The answer is: 650.

In a Geometry exam, Madeline got 2 mistakes which are half as many mistakes as Leo. Brent scored 25 and has 1 more mistake than Leo. What is Madeline's score?
Let's think: Leo got 2 x 2 = 4 mistakes. So, Brent got 4 + 1 = 5 mistakes. This means that 25 + 5 = 30 is the perfect score. Hence, Madeline got a score of 30 - 2 = 28.. The answer is: 28.

A special school for deaf and blind students has a deaf student population three times the size of blind student population. If the number of deaf students is 180, how many students are there altogether?
Let's think:
Call the number of blind students b. There are 180 deaf students, which is three times the number of blind students, so 3b = 180. Multiplying both sides of the equation by 1 / 3 gives b = (1 / 3) * 180 = 60. The total number of students is 180 + 60 = 240.. The answer is: 240.