Answer the following question.
Luke started working on a 1000-piece jigsaw puzzle. The first day he worked on it, he put together 10% of the pieces. On the second day, he put together another 20% of the remaining pieces from the first day. On the third day, he put together 30% of the remaining pieces from the previous day. How many pieces does he have left to complete after the third day?
Step-by-step reasoning process: Luke started putting together, 1000 x 0.1 = 100 pieces. The next day, there were 1000 - 100 = 900 pieces left. Then he put together 900 * 0.2 = 180 pieces on the second day. So there were 900 - 180 = 720 pieces left. On the third day, he put together 720 * 0.3 = 216 pieces. Therefore, Luke still has 720 - 216 = 504 pieces left to complete the puzzle.
The answer is 504.

Answer the following question.
Cindy and Olaf made 15 candied apples which they will be selling for $2 each, and 12 candied grapes which they will be selling for $1.5. How much will they earn if they sell everything?
Step-by-step reasoning process: They will earn 15 x $2 = $30 for the candied apples. They will earn 12 x $1.5 = $18 for the candied grapes. Therefore, Cindy and Olaf will earn $30 + $18 = $48 if they sell everything.
The answer is 48.

Answer the following question.
Laura took six trips to park. On each trip, she spent 2 hours at the park and an additinal 30 minutes walking to and from the park. What percentage of the total time she took for her trips to the park did Laura spend in the park?
Step-by-step reasoning process: During 6 days, Laura would spend 2 * 6 = 12 hours in the park. If it takes 30 minutes (or 0.5 of an hour) walking to and from the park, then for the six trips, it would take her an additional 0.5 * 6 = 3 hours to walk to and from the park. In total, she would spend a total of 12 + 3 = 15 hours on her six trips. So, the fraction of time spent in the park would be 12 / 15 = 0.8. Thus, converting fraction to percentage, Laura spent 0.8 * 100% = 80% of her trip time at the park.
The answer is 80.

Answer the following question.
Princeton had a gender reveal party and invited all of his fellow employees to celebrate with him. If the total number of guests were 60, and 2/3 were male guests, how many female guests attended the party?
Step-by-step reasoning process: The number of males in the party was 2 males / 3 guests * 60 guests = 40 males. If the total number of people at the party was 60, then there were 60 guests - 40 males = 20 females.
The answer is 20.