Step-by-step reasoning process: There are 4 letters in Jamie's last name, so Bobbie's name is 4 * 2 + 2 = 10 letters long. Samantha's last name is 3 letters shorter than Bobbie's, so there are 10 - 3 = 7 letters in Samantha's last name.
The question and answer:
Question and answer: Samantha's last name has three fewer letters than Bobbie's last name. If Bobbie took two letters off her last name, she would have a last name twice the length of Jamie's. Jamie's full name is Jamie Grey. How many letters are in Samantha's last name?
The answer is 7

Step-by-step reasoning process: Weng earns 12 / 60 = $0.2 per minute. Working 50 minutes, she earned 0.2 x 50 = $10.
The question and answer:
Question and answer: Weng earns $12 an hour for babysitting. Yesterday, she just did 50 minutes of babysitting. How much did she earn?
The answer is 10

Step-by-step reasoning process: Tony paid $7 - $5 = $2 more than Arnold. We know he bought the same number of bananas as Arnold but that he bought 2 - 1 = 1 dozen apples more than Arnold. Therefore a dozen apples should cost $2. If Arnold paid $5 and $2 for a dozen apples then the bunch of bananas cost $5 - $2 = $3.
The question and answer:
Question and answer:
Tony paid $7 for 2 dozen apples and 1 bunch of bananas. Arnold paid $5 for 1 dozen apples and 1 bunch of bananas. How much does a bunch of bananas cost?
The answer is 3