阅读短文，判断下列句子正误。

Sarah, Jane and Nancy are very good friends. Sarah is taller than Nancy. Nancy is thinner than Jane. Jane is heavier than Sarah. How old are they? Sarah is 10 years old. Jane is 1 older than Sarah. Nancy is 2 younger than Jane. They study at No. 1 Primary School. Sarah likes Chinese. Jane likes art. Nancy likes maths. They all study hard.