Answer the following question.
In 2004, there were some kids at a cookout. In 2005, half the number of kids came to the cookout as compared to 2004. In 2006, 2/3 as many kids came to the cookout as in 2005. If there were 20 kids at the cookout in 2006, how many kids came to the cookout in 2004?
Step-by-step reasoning process: In 2005, 20 / 2 * 3 = 30 kids came to the cookout. In 2004, 30 * 2 = 60 kids came to the cookout.
The answer is 60.

Answer the following question.
Oliver is working out in a gym. On Monday he worked out for 4 hours, and the next day for 2 hours less. On Wednesday he decided to work out twice as much as on Monday. On Thursday the gym was closed, so Oliver needed to exercise at home which took twice as much time as on Tuesday. How many hours in total have Oliver worked out during these four days?
Step-by-step reasoning process: On Tuesday, Oliver worked out for 4 - 2 = 2 hours. On Wednesday he decided to work out twice as much as on Monday, so for 2 * 4 = 8 hours. On Thursday, at home, Oliver trained twice as much as on Tuesday, so for 2 * 2 = 4 hours. In total Oliver trained for 4 + 2 + 8 + 4 = 18 hours.
The answer is 18.

Answer the following question.
It takes Matt 2 minutes per problem to do his math homework with a calculator and 5 minutes per problem without a calculator. If Matt's assignment has 20 problems, how much time will using a calculator save?
Step-by-step reasoning process: First find the time difference per problem: 5 minutes / problem - 2 minutes / problem = 3 minutes / problem. Then multiply that number by the number of problems to find the total time difference: 3 minutes / problem * 20 problems = 60 minutes.
The answer is 60.

Answer the following question.
Brittney can chop 15 onions in 5 minutes. Carl can chop 20 onions within that same time. How many more onions can Carl chop in 30 minutes than Brittney?
Step-by-step reasoning process: Brittney can chop 15 / 5 = 3 onions in one minute. Carl can chop 20 / 5 = 4 onions in one minute. Brittney can chop 3 x 30 = 90 onions in 30 minutes. Carl can chop 4 x 30 = 120 onions in 30 minutes. Carl can chop 120 - 90 = 30 more onions than Brittney in 30 minutes.
The answer is 30.