123456789
Chat with our AI personalities
With no digit rejected, 999999999 With no digit repeated, 987654321
987654321 is the highest nine-digit number with no repeated digits.
5 digit telephone numbers having at least one of their digits repeated is = total possible 5 digit telephone numbers - 5 digit telephone numbers without any digit being repeated. =(10*10*10*10*10)-(10*9*8*7*6) =100000-30240 =69760
9x8x7x6x5x4x3x2x1 or 9! which equals 362880 possible combinations if no digits are repeated
94205 if digits are not to be repeated and 99999 if digits can be repeated