The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?
You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?