Come up with a question and reasoning that would justify [15] as the answer.
The question is: In Rodrigo's classroom in the morning there are red chairs, yellow chairs, and blue chairs. There are 4 red chairs. There are 2 times as many yellow chairs as red chairs, and there are 2 fewer blue chairs than yellow chairs. In the afternoon, Lisa borrows 3 chairs. How many chairs are left in Rodrigo's classroom?
Reasoning: There are 2 * 4 red chairs = 8 yellow chairs. There are 8 yellow chairs - 2 = 6 blue chairs. Total in the morning there were 4 red + 8 yellow + 6 blue = 18 chairs. After Lisa removed chairs there were 18 - 3 chairs = 15 chairs remaining.

Come up with a question and reasoning that would justify [64] as the answer.
The question is: Anika has 4 more than twice the number of pencils as Reeta. If Reeta has 20 pencils, how many pencils do the two have together?
Reasoning: If Reeta has 20 pencils, then twice that number is 2 * 20 = 40 pencils. Anika has 4 more than twice the number of pencils as Reeta, which means she has 40 + 4 = 44 pencils. Together, the two have 44 + 20 = 64 pencils.

Come up with a question and reasoning that would justify [2] as the answer.
The question is: There were 18 students assigned in a minibus for a field trip. Eight of these students were boys. On the day of the field trip, the number of girls and boys was the same since some of the girls were not able to join the trip. How many girls were not able to join the field trip?
Reasoning: 8 boys + 8 girls = 16 students joined the field trip. Thus, 18 - 16 = 2 girls were not able to join the field trip.