Answer:
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
I am owned by the poor, the rich do not need me. If you eat me, you will die! What am I?
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
I have a face and two hands, but I have no arms or legs. Six plus seven is one. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.