
    Design a function for an adaptive learning system that determines if a given difficulty rating forms a special pattern, where the rating number is exactly one less than double its reverse digits. This mathematical relationship helps generate engaging number sequence problems that maintain consistent challenge levels across different student skill groups.
    

    
def rev(num):
    rev_num = 0
    while num > 0:
        rev_num = rev_num * 10 + num % 10
        num = num // 10
    return rev_num

def check(n):
    """
    Design a function for an adaptive learning system that determines if a given difficulty rating forms a special pattern, where the rating number is exactly one less than double its reverse digits. This mathematical relationship helps generate engaging number sequence problems that maintain consistent challenge levels across different student skill groups.
    

    """
def rev(num):
    rev_num = 0
    while num > 0:
        rev_num = rev_num * 10 + num % 10
        num = num // 10
    return rev_num

def check(n):
    """
    Design a function for an adaptive learning system that determines if a given difficulty rating forms a special pattern, where the rating number is exactly one less than double its reverse digits. This mathematical relationship helps generate engaging number sequence problems that maintain consistent challenge levels across different student skill groups.
    

    """
    return 2 * rev(n) == n + 1