What does this simple rebus mean?

How many bananas can you eat if your stomach is empty?

Can you count the number of triangles in the picture below?

What does a man do only once in his lifetime, but women do once a year after they are 29?

The answer I give is yes, but what I mean is no. What was the question?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

why number 8549176320 is one of a kind?

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

By what process could you make a 'Tea-Table' into food?