4
It is if the number is more than ' 1 '. If the number is less than ' 1 ', then it's smaller than its own square root.
There are three perfect squares between 0 and 50 that are even.
Prime numbers, except 2, are always odd (they would not be prime if they were even cos they would be divisible by 2.) 1 less than any odd number must be an even number.
An even number less than 57.
256 is the greatest even square number that is less than 300.
There is only one even prime number and that is 2 as all over even numbers can be divided by 2 and 2 is not square so there isn't a number less than 100 that is an even prime square number.
4
It is: 4
All of those demanding criteria are met by the number 16 .
It is if the number is more than ' 1 '. If the number is less than ' 1 ', then it's smaller than its own square root.
There are three perfect squares between 0 and 50 that are even.
1 is a triangular and square number, and it is less than 60.
All but the square numbers - 53 of them.
There are 49 even numbers less than 100, but only the number 2 is an even prime number less than 100.
Every non-negative real number is a square (every number if in the complex field) so every real number greater than or equal to -1 is one less than a square. Even if you restrict yourself to perfect squares, of the form n2, then n2 - 1 = (n-1)*(n+1) is one less than a square. There are infinitely many such numbers.
Prime numbers, except 2, are always odd (they would not be prime if they were even cos they would be divisible by 2.) 1 less than any odd number must be an even number.