1. "The ages of your six kids are certainly special," said Juan. "All spaced one year apart?" Sofia smiled. "Is that what you mean?" "Something else," her father replied. "If you add the oldest to the youngest you get the difference between your age and mine, and your age is the product of the three youngest divided by the sum of those three." Susan shook her head. "I'll take your word for it, and anyway you're four times the age of the oldest," she declared. How old was Juan?

68 years old

56 years old

61 years old