How many numbers are there between 100 and 1000 such that : atleast one of the digits is 5?

How many numbers are there between 100 and 1000 such that at least one of their digits is 7 ?

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

How many whole numbers are there between 41 and 91?

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

How many whole numbers are there between 32 and 53?

How many numbers are there between 1000 and 9999 so that no digit is repeated.

How many even numbers are there with three digits such that if 5 is one of the digits, then 7 is the next digit ?