Question: In two years, Ophelia will be four times as old as Lennon. If Lennon is currently eight years old, how old is Ophelia?
Answer with step-by-step thinking: In two years, Lennon will be 2 + 8 = 10 years old. Ophelia will be 4 * 10 = 40 years old in two years. Currently, Ophelia is 40 - 2 = 38 years old.
So the answer is 38.

Question: There are enough provisions in a castle to feed 300 people for 90 days. After 30 days, 100 people leave the castle. How many more days are left until all the food runs out?
Answer with step-by-step thinking: After 30 days, there will be enough food left to sustain 300 people for 90 days 30 days = 60 days. After the 100 people leave, there will be 300 - 100 = 200 people left. The 200 people will eat 200 / 300 = 2 / 3 as much food as the original group of people in the castle. The 60 days' worth of food will last this smaller group for 60 days / (2 / 3) = 90 more days.
So the answer is 90.

Question: Nigel won $45 but gave some away. His mother gave him $80 more. If now Nigel has $10 more than twice the amount he originally had, how much money did he give away?
Answer with step-by-step thinking:
Twice the amount Nigel originally had is 2 * 45 = 90 dollars. Now, Nigel has 10 dollars more, meaning that he has 10 + 90 = 100 dollars. Before his mother gave him 80 dollars, he had been left with 100 - 80 = 20 dollars. This means that Nigel gave away 45 - 20 = 25 dollars.
So the answer is 25.