Tim's car goes down in value by $1000 a year. He bought it for $20,000. How much is it worth after 6 years? Give the rationale and then the answer.
Let's think step by step. It went down in value 1000 * 6 = $6000. So the car is worth 20000 - 6000 = $14,000.. The answer is: 14000.

Trey has 7 times as many turtles as Kris. Kris has 1/4 as many turtles as Kristen has. How many more turtles does Trey have than Kristen, if Kristen has 12? Give the rationale and then the answer.
Let's think step by step. Kris has 12 / 4 = 3 turtles. Trey has 3 * 7 = 21 turtles. Trey has 21 - 12 = 9 more turtles than Kristen.. The answer is: 9.

The sum of the ages of Jeremy, Sebastian and Sophia in three years is 150. Currently, Sebastian is 4 years older than Jeremy. If Jeremy's age is 40, calculate Sophia's age three years from now? Give the rationale and then the answer.
Let's think step by step. The age of Jeremy three years from now will be 40 + 3 = 43 years. Since Sebastian age is four years more than Jeremy's, Sebastian is currently 40 + 4 = 44 years. In three years, Sebastian will be 44 + 3 = 47 years old. The total age of Jeremy and Sebastian in three years will be 47 + 43 = 90. If the total age of Jeremy, Sebastian and Sophia in three years is 150, then Sophia's age in three years will be 150 - 90 = 60.. The answer is: 60.