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:
What is prob of picking 3 o and 1 p when four letters picked without replacement from pooooopppppoo?
answer:
42/143


question:
Suppose -u = -7 + 1. What is the remainder when 17 is divided by u?
answer:
5


question:
Suppose 0*b - 4*b - 4 = 0. Let l be (1/(-2))/(b/36). What is the greatest common factor of 6 and l?
answer:

6