
    Given a list of individual transaction amount digits from a customer's recent banking activity, determine the highest possible fraudulent transaction value that could be attempted by rearranging these digits. The fraud detection system needs this maximum potential value to set appropriate transaction limits and triggers for the account.
    

    
def find_Max_Num(arr):
    """
    Given a list of individual transaction amount digits from a customer's recent banking activity, determine the highest possible fraudulent transaction value that could be attempted by rearranging these digits. The fraud detection system needs this maximum potential value to set appropriate transaction limits and triggers for the account.
    

    """
def find_Max_Num(arr):
    """
    Given a list of individual transaction amount digits from a customer's recent banking activity, determine the highest possible fraudulent transaction value that could be attempted by rearranging these digits. The fraud detection system needs this maximum potential value to set appropriate transaction limits and triggers for the account.
    

    """
    n = len(arr)
    arr.sort(reverse=True)
    num = arr[0]
    for i in range(1, n):
        num = num * 10 + arr[i]
    return num