Question: Samuel swept the porch and cleared nine-tenths of the dust particles from it. As he walked across the porch afterward, his shoes left 223 dust particles behind. How many dust particles were on the porch before Samuel swept if there were 331 after he walked across it?
Answer: Step-by-step reasoning process: Before Samuel walked across the porch, there were 331 - 223 = 108 dust particles. Those 108 were 1 / 10 of the original amount, so there were 108 * 10 = 1080 dust particles on the porch before Samuel swept.
So the answer is 1080.

Question: Tire repair for each tire costs $7, plus another 50 cents for sales tax. If Juan needs all 4 tires repaired, how much is the final cost?
Answer: Step-by-step reasoning process: Juan pays 4 * 7 = 28 dollars for all four tire repairs. Juan pays 0.50 * 4 = 2 dollars in sales tax for all four tire repairs. Juan pays a total of 28 + 2 = 30 dollars.
So the answer is 30.

Question: Eustace is twice as old as Milford. In 3 years, he will be 39. How old will Milford be?
Answer: Step-by-step reasoning process: Eustace’s current age must be 39 years old – 3 years = 36 years old. So Milford’s current age must be 36 years old / 2 = 18 years old. So in 3 years, Milford will be 18 years old + 3 years = 21 years old.
So the answer is 21.

Question: Anne's female cat weighs 2 kilograms. Her male cat is two times heavier. If Anne is going to carry both of them, how many kilograms is she carrying?
Answer:
Step-by-step reasoning process: Anne's male cat weighs 2 x 2 = 4 kilograms. Thus, Anne is carrying a total of 2 + 4 = 6 kilograms when she carries both of them.
So the answer is 6.