Q: Beau’s sons are triplets. They are 16 years old today. Three years ago, the sum of his 3 sons’ ages equaled Beau’s age. How old is Beau today?
A: Three years ago, his sons were 16 - 3 = 13 years old. Three years ago, Beau was 13 + 13 + 13 = 39 years old. Today, Beau is 39 + 3 = 42 years old. The answer is 42.

Q: Matt has 8 baseball cards worth $6 each. If he trades two of them to Jane in exchange for 3 $2 cards and 1 $9 card, how much profit does he make?
A: First find the value of the 2 cards Matt trades: $6 / card * 2 cards = $12. Then find the total value of the 3 $2 cards: 3 cards * $2 / card = $6. Then subtract the value of the cards Marcus gave up from the value of the cards he gained to find his profit: $9 + $6 - $12 = $3. The answer is 3.

Q: On a quiz, Martin answered three fewer questions correctly than Kelsey, and Kelsey answered eight more questions correctly than Campbell. If Campbell answered 35 questions correctly, how many did Martin answer correctly?
A:
Kelsey answered 35 + 8 = 43 correctly. Martin answered 43 - 3 = 40 correctly. The answer is 40.