How many numbers lying between 100 and 1000 can be formed with the digits 0, 1, 2, 3, 4, 5, if the repetition of the digits is not allowed?

How many numbers greater than 1000000 can be formed by using the digits 1, 2, 0, 2, 4, 2, 4?

How many 4-digit numbers can be formed by using the digits 1 to 9 if repetition of digits is not allowed?

How many odd numbers less than 1000 can be formed by using the digits 0, 3, 5, 7 when repetition of digits are not allowed.

How many six-digit odd numbers, greater than 6,00,000, can be formed from the digits 5, 6, 7, 8, 9, and 0 if repetition of digits is allowed repetition of digits is not allowed.

How many three- digit numbers, which are divisible by 5, can be formed using the digits 0,1,2,3,4, 5 if (i) repetition of digits are not allowed ? (ii) repetition of digits are allowed ?