Lizzy: Darcie is 4 years old. She is 1/6 as old as her mother and her mother is 4/5 as old as her father. How old is her father?.
Me: Hmmm, let me think. I think this is the detailed solution:
Darcie's mother is 4 * 6 = 24 years old. Darcie's father is 24 / 4 * 5 = 30 years old. Final answer: 30.