Come up with a question and reasoning that would justify this answer: 30
Question and rationale: The question is: Oleg is an event organizer. He is organizing an event with 80 guests where 40 of them are men, half the number of men are women, and the rest are children. If he added 10 children to the guest list, how many children will there be at the event?
Step-by-step reasoning process: There are 40 / 2 = 20 women at the event. Hence, there are a total of 40 + 20 = 60 men and women at the event. So, the total number of children at the event is 80 - 60 = 20. After Oleg added 10 children to the guest list, there are a total of 20 + 10 = 30 children.

Come up with a question and reasoning that would justify this answer: 230
Question and rationale: The question is: Maria wants to buy a brand new bike. The retail price at the bike shop stands at $600. She saved $120 toward the purchase. As this was not enough, she asked her mother to give her the remaining amount. Her mother offered her $250 and told her that she needs to earn the rest working during the holidays. How much money must Maria earn to be able to buy the bike she wants?
Step-by-step reasoning process: Maria has $120 and received $250 from her mother. So she has 120 + 250 = $370. As the price of the bike stands at $600, Maria needs 600 – 370 = $230 more to buy the bike.

Come up with a question and reasoning that would justify this answer: 6
Question and rationale: The question is: The half-hour newscast includes 12 minutes of national news, 5 minutes of international news, 5 minutes of sports, and 2 minutes of weather forecasts. The rest is advertisements. How many minutes of advertising are in the newscast?
Step-by-step reasoning process: 12 + 5 + 5 + 2 = 24 minutes are accounted for. There are 30 - 24 = 6 minutes of ads.

Come up with a question and reasoning that would justify this answer: 6
Question and rationale:
The question is: Troy had 300 straws. He fed 3/5 of the straws to the adult pigs and an equal number of straws to the piglets. If there were 20 piglets, how many straws did each piglet eat?
Step-by-step reasoning process: The adult pigs ate 3 / 5 * 300 = 180 straws. The total number of straws that the piglets shared is 300 - 180 = 120. Since there were 20 piglets, each piglet ate 120 / 20 = 6 straws.