1. Harry looked at the scrap of paper in the boy’s hand. “That 5-figure number?” he asked. “It doesn’t mean a thing to me. Should it?” “I suppose not, Dad, but it is rather special,” Ted replied. “Half of it is one less than the square of our number, and a third of it is one less than the square of Aunt Betty’s number.” What was Betty’s number?

Betty’s number was 66

Betty’s number was 72

Betty’s number was 89