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).

Two letters picked without replacement from vssvvnddvvnlnan. What is prob of picking 1 l and 1 n?
4/105

Solve 56 - 20 = -3*i - 4*w, 5*i + 4*w = -44 for i.
-4

What is the next term in 2506, 5011, 7516, 10021, 12526, 15031?

17536