Most of the time, both can be used interchangeably. However, "perhaps" is normally used in contexts that are a little more formal. But tell yourself that in general, you can use one another without being afraid of making a mistake. Hope that helps!

similar to the previous answer; they can be used interchangeably.

Hey Karima, I asked the same question yesterday. I sometimes get confused when it comes to choosing one or another to be used in a sentence. Yet, I must say I have learned about the proper usage of these words. So, I shall provide an explanation over the difference (in position) between them - slight though it is, you should know that the difference exists: 1) You use ''maybe'' or ''perhaps'' to indicate that something is possible, although you are not certain about it. There is no difference in meaning between these words. E.g.: ''Maybe she was wrong.'' E.g.: ''Perhaps he is right after all.'' 2) ''Maybe'' is normally used only at the beginning of a clause. E.g.: ''Maybe he'll be a doctor one day.'' E.g.: ''When do you think about having children?'' ''Well, I do not know, maybe when I am 40.'' 3) ''Perhaps'' can be used in other positions in a clause. E.g.: ''When do you think about having children?'' ''Well, I do not know. When I am 40, perhaps.'' E.g.: ''It was perhaps her unconventional approach to life that made her such a great actress.'' Hope that helps!!!

they are the same