How many numbers are there between 100 and 1000 in which all the digits are distinct?

How many numbers are there between 100 and 1000 which will divisible by 10?

How many numbers are there between 100 and 1000. Repetation is allowed.

How many numbers are there between 100 and 1000 such that 7 is the unit’s place.

How many numbers are there between 100 and 1000 consists such that every digit is either 2 or 9?

How many numbers are there between 100 and 1000 such that 7. is in the units places?

How many numbers are there between 100 and 1000 such that every digit is either 7 or 9 ?

How many numbers are there between 100 and 1000 such that every digit is either 2 or 9 ?

How many numbers are there between 3000 and 4000 which can be formed with the digits 3,4,5,6,7,8 and repetition of digits is not allowed?

How many 6-digit numbers are there?

How many 7-digit numbers are there?