Question 23
How many four-digit numbers have all three of the following properties?
(I) The tens digit and ones digit are both $9.$
(II) The number is $1$ less than a perfect square.
(III) The number is the product of exactly two prime numbers.
(I) The tens digit and ones digit are both $9.$
(II) The number is $1$ less than a perfect square.
(III) The number is the product of exactly two prime numbers.