Linford took the iPad and thought for a while. He almost worked out the solution within a second, but he didn’t tell his daughter the answer first, “If I solve this puzzle for you, will you give me any reward, Candace?”

Candace thought for a while, deciding to give her Daddy her favorite cake as a reward.

Linford nodded and turned to look at Cristelle, “How about you?”

Cristelle was thinking about the answer. She was a bit confused when Linford asked the question, “You want a reward ...