What is the number of members in the house of representatives based on?
The population of a state.
Do all States and Territories have the same number of House of Representatives members Why do you think they are different?
It has 100 members because it has consists of two representatives from each state. This is based on the New Jersey Plan to have and even number of representatives from each state in the Congress which you may know includes the House of Representatives which has representatives based on the population of each state (and currently has 435 members).