1. “Fred’s new house?” Joe smiled. “It’s an easy number to remember.” “One of your gimmicks, I suppose,” Maud replied. “Well, let’s have it.” Joe nodded “All right. Five times the first figure, plus three times the last, gives one less than the product of its two digits.” So what was the number?

Fred’s number was 79.

Fred’s number was 96.

Fred’s number was 63.