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

How many 6-digit numbers are there?

How many 7-digit numbers are there?

How many 7- digit numbers are there?

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

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that (i) repetition of the digits is allowed? (ii) repetition of the digits is not allowed?

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that (i) repetition of the digits is allowed? (ii) repetition of the digits is not allowed?

How many 5-digit numbers are there in all?

How many 3-digit even number can be formed form the digits 1,2,3,4,5,6 if the digits can be repeated?

How many 3 -digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 if the digits can be repeated?

How many 3 -digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 if the digits can be repeated?