Question: Jenny is older than Charlie by five years, while Charlie is older than Bobby by three years. How old will Charlie be when Jenny becomes twice as old as Bobby?
Answer: Jenny is older than Charlie by 5 years who is older than Bobby by 3 years, so Jenny is older than Bobby by 5 + 3 = 8 years. Jenny will be twice as old as Bobby when he is 8 * 2 = 16 years old. Jenny is 5 years older than Charlie so when Jenny is 16, Charlie will be 16 - 5 = 11 years old. The answer is 11.

Question: Megan's grandma gave her $125 to start a savings account. She was able to increase the account by 25% from funds she earned babysitting. Then it decreased by 20% when she bought a new pair of shoes. Her final balance is what percentage of her starting balance?
Answer: Megan started with $125 and increased it by 25%, so $125 + (0.25)125 or $125 + $31.25 = $156.25. Then the balance decreased by 20%, so $156.25 (0.20)156.25 or $156.25 - $31.25 = $125. $125 is the balance Megan started with, so her final balance is 100% of the starting balance. The answer is 100.

Question: Jen buys and sells candy bars. She buys candy bars for 80 cents each and sells them for a dollar each. If she buys 50 candy bars and sells 48 of them, how much profit does she make in cents?
Answer: It costs Jen 80 * 50 = 4000 cents to buy 50 candy bars. Since a dollar is 100 cents, she earns 48 * 100 = 4800 cents by selling 48 of them. Thus her total profit is 4800 - 4000 = 800 cents. The answer is 800.

Question: A pet store has six dogs for sale. They have half as many cats, twice as many birds, and thrice as many fish for sale. How many animals are for sale in the pet store?
Answer:
The pet store has 6 / 2 = 3 cats for sale. They have 6 x 2 = 12 birds for sale. They have 6 x 3 = 18 birds for sale. Therefore, there are a total of 6 + 3 + 12 + 18 = 39 pets for sale. The answer is 39.