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]: What is twenty-three sevenths of a week in hours?
[A]: 552


[Q]: Let v = -7 - -11. Suppose 0 = 5*n + n - 78. Suppose v*a + n = p, -p + 15 = 5*a + 2. What is the tens digit of p?
[A]: 1


[Q]: Let p = -12 + 20. Let q(c) = c**3 - 4*c**2 + 2*c - 5. Let k be q(4). Let l be k - 2 - (-1 - -1). Calculate the greatest common factor of l and p.
[A]:
1