How many 3-digit number have exactly one of their digits as 5?

(i) How many numbers are there between 100 and 1000 such that at least one of their digits is 7 ? (ii) How many of them have exactly one of their digits as 7 ?

How many of them have exactly one of their digits as 7 ?

How many 6-digit numbers have at least 1 even digit?

How many 3-digit numbers can be formed from the digit 2, 4, 5, 6, 7 if no digit is repeated?

The number of 5 digit numbers having atleast one of their digit repeated is

How many numbers are there between 100 and 1000 which have exactly one of their digits as 7?

How many six-digit numbers contain exactly four different digits?

How many 3 digit numbers can be formed by using the digits 0, 1, 2, 3, 4, 5 in how many of these we have atleast one digit repeated ?

How many numbers are there between 500 and 1000 which have exactly one of their digits as 8.

How many numbers are there between 100 and 1000, which have exactly one of their digits as 7?