local options = {
    [1] = function(a, b) 
        return a + b 
    end,
    [2] = function(a, b)
        return a - b
    end,
    [3] = function(a, b)
        return a * b
    end,
    [4] = function(a, b)
        return a / b
    end,
    [5] = function(a, b)
        return a % b 
    end,
    [6] = function(a, b)
        return a ^ b  
    end,
    [7] = function(a, b)
        return math.max(a, b)  
    end,
    [8] = function(a, b)
        return math.min(a, b) 
    end,
    [9] = function(a, b)
        return (a + b) / 2  
    end,
    [10] = function(a, b)
        return math.abs(a - b)  
    end,
}

local Math = {
    random = function(num1, num2)
        ran = math.random(1, #options) 
        
        return options[ran](num1, num2)
    end
}

for i = 1,10 do 
print(Math.random(10, 20))
end