Jessica is six years older than Claire. In two years, Claire will be 20 years old. How old is Jessica now? Give the rationale and then the answer.
Let's think step by step. Claire's age now is 20 - 2 = 18 years old. Being 6 years older than Claire, Jessica is 18 + 6 = 24 years old.. The answer is: 24.

Loraine makes wax sculptures of animals. Large animals take four sticks of wax and small animals take two sticks. She made three times as many small animals as large animals, and she used 12 sticks of wax for small animals. How many sticks of wax did Loraine use to make all the animals? Give the rationale and then the answer.
Let's think step by step. Loraine made 12 / 2 = 6 small animals. She made 6 / 3 = 2 large animals. She used 2 * 4 = 8 sticks of wax on large animals. Therefore, Loraine used 12 + 8 = 20 sticks of wax for all the animals.. The answer is: 20.

Rosie runs 6 miles per hour. She runs for 1 hour on Monday, 30 minutes on Tuesday, 1 hour on Wednesday, and 20 minutes on Thursday. If she wants to run 20 miles for the week, how many minutes should she run on Friday? Give the rationale and then the answer.
Let's think step by step. On Monday and Wednesday, Rosie runs 6 * 1 = 6 miles. On Tuesday, Rosie runs 6 * (30 minutes / 60 minutes) = 3 miles. On Thursday, Rosie runs 6 * (20 minutes / 60 minutes) = 2 miles. So far this week Rosie has run 6 + 3 + 6 + 2 = 17 miles. To reach her goal, she must run 20 - 17 = 3 miles on Friday. Thus, she should run for 6 / 3 = .5 hour which is 30 minutes.. The answer is: 30.