Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

[Q]: Four letters picked without replacement from {k: 2, m: 16}. Give prob of picking 4 m.
[A]: 91/153


[Q]: What is next in -567, -578, -605, -654, -731?
[A]: -842


[Q]: Let n = 57/29 + 159/406. What is the common denominator of 7/16 and n?
[A]:
112