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: Let h(m) = m. Let u be h(4). Suppose -q = u + 2. Let b(i) = i**2 + 6*i + 2. Let z be b(q). Calculate the greatest common divisor of z and 5.

A: 1
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Q: Solve -189 = -7*k - 133 for k.

A: 8
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Q: Solve -2*b + 28 = -5*q, -b - q + 4 = b for b.

A:
4
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