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).

[EX Q]: Four letters picked without replacement from {u: 9, s: 9}. Give prob of picking 3 s and 1 u.
[EX A]: 21/85

[EX Q]: Suppose -3*n + 16 = -d, 0*n - 5*d = 3*n - 10. Let k = n + -3. Suppose 0 = k*g - g - 14. What is the greatest common factor of 28 and g?
[EX A]: 14

[EX Q]: Suppose 6*u - 226 = 92. Calculate the remainder when u is divided by 14.
[EX A]:
11