instruction:
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).
question:
Calculate prob of sequence ffff when four letters picked without replacement from {f: 6}.
answer:
1


question:
What is 1/5 of a millennium in centuries?
answer:
2


question:
Let j be 2 + (1 - -20 - -1). Suppose 0 = 2*h + 4*n - j, n + 2*n - 15 = 0. Let r = -46 - -51. Solve r*q + 1 = -0*q + x, 0 = h*q + 4*x - 4 for q.
answer:

0