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]: What comes next: -18, -32, -60, -108, -182, -288, -432, -620?
[EX A]: -858

[EX Q]: What is prob of sequence dd when two letters picked without replacement from uddudd?
[EX A]: 2/5

[EX Q]: Let b(n) = -n - 3. Let s be b(-5). Suppose k - 4 = -s*p - 3*p, -3*k + 2*p + 12 = 0. What is the greatest common factor of 44 and k?
[EX A]:
4