Can you replace the question mark with the correct number?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Why do Chinese men eat more rice than Japanese men do ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

I have branches, but no fruit, trunk or leaves. What am I?

A man dies of old age on his 25 birthday. How is this possible?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

I travel all around the world but always stay in the corner. What am I?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?