Q: Denise will be 25 years old in two years. Her sister, Diane, is 4 years younger. In how many years will Diane be 25 years old?
A: Denise is 25 - 2 = 23 years old now. So, Diane is 23 - 4 = 19 years old now. Diane will be 25 years old in 25 - 19 = 6 years. The answer is 6.

Q: John takes a pill every 6 hours. How many pills does he take a week?
A: He takes 24 / 6 = 4 pills a day. So he takes 4 * 7 = 28 pills a week. The answer is 28.

Q: In one week, Jake can eat 3 papayas, his brother can eat 5 papayas, and his father can eat 4 papayas. To account for 4 weeks, how many papayas does Jake need to buy from the farmer’s market?
A:
In one week, the 3 men can eat 3 + 5 + 4 = 12 papayas. For 4 weeks, Jake will need to buy 12 x 4 = 48 papayas. The answer is 48.