Can you start the fire using two pieces of wood?

What demands an answer, but asks no questions

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

John walks into the daily grocery shop and steals a $100 bill from the shop. An hour later John returns to the shop and buys some daily products for $40. John pays the owner the $100 bill and therefore the owner returns him $60.

How much money did the owner lose?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is common among 11, 69, and 88?

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?