Which of the following are kinds of comparison degree?

Cheese butter potato chip is not too salty. Salted egg potato chip is very salty. There is ____ salt in cheese butter potato chip and there is _____ salt in salted egg potato chip.

Mathematics is ___________lesson for me. I can’t even memorize multiplication table.

She’s a few inches ____ than her brother.

She needs a _______ string than this to tie the parcel.

My brother always ranks the first in his class and so do I. I am ______ my brother.