3364. If we simply this problem to the differnce between 4^2 and 6^2, we see that the differnce is 20. This is basically eaual to the distance between 4^2 and 5^2 plus the distance between 5^2 and 6^2. To calculate the distance I use the formula (sq number, in this example 6 x 2-1), this means the distance from 5^2 to 6^2 is 11, and the distance from 4^2 to 5^2 is 9. We can also takeaway that the differenmce between squares is ALWAYS 2 greater than the last one.

So, back to the problem, we can tell that the squares have to be 113 and 115 apart, which means that 2x-1=115, meaning that x = 58, doing the same thing to 113, means that x = 56.

To check our answers, 58^2 is 3364, and 56^2 is 3136, the difference between these two is 228, meaning that our answer (58^2 or 3364) is correct!