Celine collected twice as many erasers as Gabriel did. Julian collected twice as many erasers as Celine did. If they collected 35 erasers in total, how many erasers did Celine collect? Give the rationale and then the answer.
Let's think step by step. Let x represent the number of erasers Gabriel collected. Celine collected 2 * x erasers. Julian collected 2 * x * 2 = 4 * x erasers. In total, Gabriel, Celine and Julian collected x + 2 * x + 4 * x = 7 * x erasers. 7 * x = 35. x = 5. Celine collected 5 * 2 = 10 erasers.. The answer is: 10.

Randolph is 5 years older than Sydney. Sydney is twice as old as Sherry. If Sherry is 25, how old is Randolph? Give the rationale and then the answer.
Let's think step by step. Sydney is 25 * 2 = 50 years old. Randolph is 50 + 5 = 55 years old.. The answer is: 55.

Bret and a team of 3 co-workers were working late so he ordered dinner for everyone. They decided on Chinese. Each main meal costs $12.0. They also ordered 2 appetizers that were $6.00 each. He includes a 20% tip and an extra $5.00 to make it a rush order. How much does Bret spend on dinner? Give the rationale and then the answer.
Let's think step by step. There are 4 co - workers and each of their meals is $12.00 so 4 * 12 = $48.00. They order 2 appetizers at $6.00 each so 2 * 6 = $12.00. The meals costs $48.00 and the appetizers costs $12.00 for a total of 48 + 12 = $60.00. A 20% tip on the $60.00 order is .20 * 60 = $12.00. So the meal is $60.00, the tip is $12.00 and he adds a $5.00 rush for a total of 60 + 12 + 5 = $77.00.. The answer is: 77.