Arrange the following fractions in descending order: 5/9, 4/7 and 1/2

Which of the following fraction sets is arranged in descending order?

Which of the following fractions is the largest: 4/5, 7/8, 6/7, 5/6?

Which of the following fractions has a reciprocal that is a proper fraction?

Out of the given fractions 4/9, 5/7, 11/13, 13/17, which one is the largest?

A number X lies between 0 and 1. Which of the following is true?