3cubed is 27, 5 squared is 25.
Answer is 26
26
123
eight ( 8 )
87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.
It is 64 which is also a square number
0, 1 and 64
123 is two less than 53 = 125 and two more than 112 = 121
6859. Cube root of 9999 is 21.54, so find the largest prime number less than that (19), then cube that number. 19^3=6,859
For a number to be both a square and a cube, it would have to be a sixth power. There are three sixth powers less than 100: 0^6 = 0, 1^6 = 1 and 2^6 = 64.
2 digit number which is square number less than 42 but greater than 29 = 36square numbers are 2, 9, 16, 25, 36, 49,...
153....
It doesn't matter if you know that the largest three-digit prime number is 997 or that its cube root is 9.98998998. If you include zero in the whole numbers, the answer will be zero.