[Question]Kelsey turned 25 in 1999. Her older sister was born 3 years before Kelsey. It's currently 2021. How old is Kelsey's older sister?
[Answer]Kelsey turned 25 in 1999 so she was born in 1999 - 25 = 1974. Kelsey's sister is older by 3 years so she was born in 1974 - 3 = 1971. It's currently 2021 and Kelsey's sister was born in 1971 so she is 2021 - 1971 = 50 years old. The answer is 50.
Q: Four classmates were comparing their ages based on their birth month. They found out that Jolyn is 2 months older than Therese while Therese is 5 months older than Aivo. Then, Leon is 2 months older than Aivo. How much older in months is Jolyn than Leon?
A: Jolyn is 2 + 5 = 7 months older than Aivo. Since Leon is 2 months older than Aivo, then Jolyn is 7 - 2 = 5 months older than Leon. The answer is 5.
Question: Charley bought 30 pencils. She lost 6 pencils while moving to school, and of course, also lost 1/3 of the remaining pencils because she wasn't very good at keeping track of pencils. How many pencils does she currently have?
Answer: If Charley bought 30 pencils and lost 6 while moving, she remained with 30 - 6 = 24 pencils. Because she isn't good at keeping track of her pencils, Charley lost 1 / 3 * 24 = 8 more pencils. She currently has 24 - 8 = 16 pencils. The answer is 16.
[Question]There are two babysitters named Mila and Agnes. Mila makes $10 an hour while Agnes makes $15 an hour. Agnes works 8 hours each week. How many hours does Mila need to work to earn as much as Agnes in a month?
[Answer]The weekly salary of Agnes is $15 x 8 = $120. So in a month, Agnes earns $120 x 4 = $480. Therefore, Mila needs to work for $480 / $10 = 48 hours to earn as much as Agnes's monthly earnings. The answer is 48.
Q: Ruel has four books of 10 stamps and six books of 15 stamps. How many stamps does Ruel have?
A: Ruel has a total of 4 x 10 = 40 stamps from the four books. He also has 6 x 15 = 90 stamps from the six books. Therefore, he has a total of 40 + 90 = 130 stamps. The answer is 130.
Question: Dawn, Lydia, and Donna have a total of 200 bananas. Dawn has 40 more bananas than Lydia. If Lydia has 60 bananas, how many bananas does Donna have?
Answer:
If Lydia has 60 bananas, and Dawn has 40 more, then Dawn has 60 + 40 = 100 bananas. The total number of bananas Dawn and Lydia have is 100 + 60 = 160 bananas. Donna has 200 - 160 = 40 bananas. The answer is 40.