Cool gifts for math lover. Show the whole world that you love math. Perfect gift for mathematicians and math teacher.This perfect notebook for writing notes and ideas. It is great as a composition notebook, diary, and journal .-100 blank lined white pages (50 sheets)-6"x9" notebook, perfect size for your desk, backpack, school, home or work.-Perfect sturdy matte softcover.-It can be used to write notes, diary, planner, and journal.