Tracy set up a booth at an art fair. 20 people came to look at her art. Four of those customers bought two paintings each. The next 12 of those customers bought one painting each. The last 4 customers bought four paintings each. How many paintings did Tracy sell at the art fair?
Let's think: The first 4 customers bought 4 * 2 = 8 paintings. The next 12 customers bought 12 * 1 = 12 paintings. The last 4 customers bought 4 * 4 = 16 paintings. In total Tracy sold 8 + 12 + 16 = 36 paintings.. The answer is: 36.

In January, Bill's labrador puppy weighs 40 pounds and his dachshund puppy weighs 12 pounds. Each dog gains 25% of their starting weight over the year. What's the difference in their weight at the end of the year?
Let's think: First find how much weight the labrador puppy gains: 40 pounds * 25% = 10 pounds. Then add that weight gain to the puppy's starting weight: 40 pounds + 10 pounds = 50 pounds. Then find how much weight the dachshund puppy gains: 12 pounds * 25% = 3 pounds. Then add that weight gain to the puppy's starting weight: 12 pounds + 3 pounds = 15 pounds. Then subtract the dachshund puppy's weight from the labrador puppy's weight to find the difference: 50 pounds - 15 pounds = 35 pounds.. The answer is: 35.

Roberto is raising chickens for eggs. He buys 4 chickens for $20 each. They cost $1 in total a week to feed and each produces 3 eggs a week that will last forever. He used to buy 1 dozen eggs a week and spent $2 per dozen. After how many weeks will the chickens be cheaper than buying his eggs?
Let's think: The chickens cost $80 because 4 x 20 = 80. His chickens produce a dozen eggs a week because 4 x 3 = 12. Each week that he has chickens is $1 cheaper than buying eggs because 2 - 1 = 1. After 80 weeks his chickens will be paid off because 80 / 1 = 80. After 81 weeks the chickens will be cheaper than buying eggs because 80 + 1 = 81.. The answer is: 81.

Rubert has 4 times the number of candies James has. James has 3 times the number of candies Adam has. If Adam has 6 candies, how many candies do the three of them have in total?
Let's think:
James has 3 * 6 candies = 18 candies. Rubert has 4 * 18 candies = 72 candies. So, the three of them have 6 candies + 18 candies + 72 candies = 96 candies.. The answer is: 96.