Answer:
How many bananas can you eat if your stomach is empty?
The yellow house has yellow window, the red house has red windows, what colour windows does the green house have?
How can you add eight 6s together so that the total adds up to 750?
What is as big as you are and yet does not weigh anything?
How do you blink twice without blinking twice?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?