Pick the odd thing out
A sequence of numbers or letters or words or strings of letters that follow a definite pattern is given. Each question has a blank space. This hasto be filled by the correct answer from the four given options to complete the sequence without breaking the pattern.
$$16\frac{2}{3}, 18\frac{3}{4}, 21\frac{3}{7}, -------, 30$$
$$\frac{1}{5040}, \frac{1}{720}, \frac{1}{120}, --------, \frac{1}{6}, \frac{1}{2}, 1$$
$$\frac{37}{50}, \frac{26}{37}, \frac{17}{26}, --------, \frac{1}{2}$$