Find the number of three-digit numbers (repetitions allowed) such that at least one of the digitsis 9

Find the number of three-digit number in which repetition is allowed and sum of digits is even.

Find number of four-digit numbers in which repetition is not allowed.

Number of three digit numbers such that atleast one of the digits is 9 , if repetitions allowed is

Number of three digit number with atleast one 3 and at least one 2 is

Find number of four-digit numbers in which repetition is not allowed. Also find number of four-digit numbers in which at least one digit is repeated.

Find the number of 3-digit numbers, formed with the digit (2,5,4,6) when repetition of the digits is allowed.

Find the number of 5 digited numbers divisible by 5 that can be formed using thedigits 0,1,2,3,4,5 when repetitions is allowed