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).

[EX Q]: Calculate prob of picking 1 e and 1 b when two letters picked without replacement from {e: 6, b: 4, n: 1}.
[EX A]: 24/55

[EX Q]: Suppose -3 = -j - 4. Let h be j + 0 + (4 - 3). What is the units digit of h - -1 - 6*-1?
[EX A]: 7

[EX Q]: Suppose -6*d + 2*d - 2*f = 0, -2*d - 2*f = 4. Suppose -5*n = -2*g - 0*g - 74, -3*g + 25 = n. Calculate the smallest common multiple of n and d.
[EX A]:
16