
    Design a function for an adaptive learning system that determines if a student should advance to the next level by checking if their assigned practice problem number follows a specific mathematical pattern. The pattern requires the number to be exactly one less than double its reverse value (for example, 209 is one less than twice 902). This mathematical relationship serves as a key indicator in the system's progression algorithm.
    

    
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 student should advance to the next level by checking if their assigned practice problem number follows a specific mathematical pattern. The pattern requires the number to be exactly one less than double its reverse value (for example, 209 is one less than twice 902). This mathematical relationship serves as a key indicator in the system's progression algorithm.
    

    """
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 student should advance to the next level by checking if their assigned practice problem number follows a specific mathematical pattern. The pattern requires the number to be exactly one less than double its reverse value (for example, 209 is one less than twice 902). This mathematical relationship serves as a key indicator in the system's progression algorithm.
    

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