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

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?

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

If (3a +6b +c +2d) x (3a - 6b - c +2d) = (3a - 6b +c- 2d) x (3a +6b - c- 2d), then which one of the following is correct ?

Which of the following interchanges of numbers would make the given equation correct? 8 x 20 / 3 + 9 - 5 = 38