Question: Kim has 12 nail polishes. Heidi has 5 more nail polishes than Kim, and Karen has 4 fewer nail polishes than Kim. How many nail polishes does Karen and Heidi have together?
Answer: Heidi has 12 + 5 = 17 nail polishes. Karen has 12 - 4 = 8 nail polishes. Heidi and Karen have 17 + 8 = 25 nail polishes together. The answer is 25.

Question: Tim spent $50.00 on Chinese take-out. 80% of the cost went to 4 entrees. The rest of the money went to 2 appetizers that each cost the same amount. How much was the price of a single appetizer?
Answer: He spent $50.00 and 80% of the meal went to entrees so he spent 50 * .80 = $40.00 on entrees. He spent $50.00 and $40.00 went to entrees so that leaves $50 - $40 = $10.00 for appetizers. Each appetizer costs the same amount and he spent $10.00 all together so each appetizer is $10 / 2 = $5.00. The answer is 5.

Question: At Rainbow Preschool, there are 80 students. 25% of them are half-day students and get picked up at noon, while the rest are full-day students. How many are full-day students?
Answer: Number of half day preschoolers is 80 x 25% = 20 students. Number of full day preschoolers is 80 - 20 = 60 students. The answer is 60.

Question: Rookie police officers have to buy duty shoes at the full price of $85, but officers who have served at least a year get a 20% discount. Officers who have served at least three years get an additional 25% off the discounted price. How much does an officer who has served at least three years have to pay for shoes?
Answer:
Cops that served a year pay $85 * 0.2 = $17 less. Cops that served a year pay $85 - $17 = $68. Cops that served at least 3 years get a $68 * 0.25 = $17 discount. Cops that served at least 3 years pay $68 - $17 = $51 for shoes. The answer is 51.