The number of 5-digit numbers in which no two consecutive digits are identical, is

The number of three-digit numbers having only two consecutive digits identical is

The number of three-digit numbers having only two consecutive digits identical is

The number of three-digit numbers having only two consecutive digits identical is

The number of three digit numbers having only two consecutive digits identical is

The number of three-digit numbers having only two consecutive digit identical N , then the value of (N//2)^(1//2) is _______.

The number of three-digit numbers having only two consecutive digit identical N, then the value of (N/2)^(1/2) is

The number of three-digit numbers having only two consecutive digit identical N , then the value of (N//2)^(1//2) is _______.