TASK DEFINITION: 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).
PROBLEM: Two letters picked without replacement from emltz. What is prob of sequence el?

SOLUTION: 1/20

PROBLEM: Four letters picked without replacement from {t: 6, e: 2}. What is prob of picking 4 t?

SOLUTION: 3/14

PROBLEM: Let u = -28 - -6. Let n = -9 - u. What is the highest common divisor of n and 13?

SOLUTION:
13