Question: Ahmed is 11 years old and Fouad is 26 years old. In how many years will Fouad's age be double Ahmed's current age?
Answer: Let X be the number of years before Fouad's age doubles Ahmed's age. So (X + 11) * 2 = X + 26. So X * 2 + 22 = X + 26. So X = 26 - 22 = 4 years. The answer is 4.

Question: Nadia is learning to play the piano. She normally makes 3 mistakes per 40 notes and can play about 60 notes a minute.  If she plays for 8 minutes how many mistakes will she make on average?
Answer: She plays 480 notes because 8 x 60 = 480. This is 12 blocks of 40 notes because 480 / 40 = 12. She makes 36 mistakes because 12 x 3 = 36. The answer is 36.

Question: John scores 2 shots worth 2 points and 1 shot worth 3 points every 4 minutes. He plays for 2 periods. Each period is 12 minutes. How many points does he score?
Answer: He played for 2 * 12 = 24 minutes. He gets 2 * 2 = 4 points per minute from the two - point shots. So he scores 4 + 3 = 7 points per minute. There are 24 / 4 = 6 intervals. So he scores 7 * 6 = 42 points. The answer is 42.

Question: Village Foods sells good food at a fair price. Their specialty is fresh vegetables. If they get 500 customers per month, and each customer purchases 2 heads of lettuce for $1 each and 4 tomatoes for $0.5 apiece, then how much money, in dollars, will the store receive in sales of lettuce and tomatoes per month?
Answer:
2 heads of lettuce at $1 apiece is 2 * $1 = $2. 4 tomatoes at $0.50 apiece is 4 * $0.5 = $2. Thus, each customer purchases $2 + $2 = $4 in lettuce and tomatoes per month. Therefore, if 500 customers per month spend $4 on lettuce and tomatoes, then the store will receive $4 * 500 = $2000 per month on sales of lettuce and tomatoes. The answer is 2000.